My new-design plasma-cut 10ga (~1/8") brackets weigh 25.9 lbs per pair and ship from 38016/38033/38060 around 25x18x8". FedEx Ground/HomeDelivery will accept them without a box (as shown); UPS charges ~$11 extra without a box - I'm not sure about other carriers. Use these dimensions with my ZIP (38133) and yours to check shipping rates on the various websites. I don't charge handling - you pay actual shipping. But if you want to use PayPal, you pay their fees in addition to what I receive.
https://www.fedex.com/ratefinder/home?cc=us&language=en&locId=express http://www.ups.com/?Site=Corporate&cookie=us_en_home&inputImgTag=&setCookie=yes http://postcalc.usps.com/ http://www.shipgreyhound.com/e/SitePages/gpxStep1.aspx The hardware included is intended to be used to replace the bracket on a truck originally factory-equipped with steps. If you are adding steps to a truck NOT originally equipped with steps, OR if any of your original fasteners are damaged/lost, I MIGHT be able to provide additional fasteners at additional cost.
UPDATE: As of Feb, 2018, I have the small front & rear L brackets that connect the ends of the steps to the body. They will be available with each set of step brackets for $10/pr, and I might have enough to sell them separately.
Even without paint, it would probably take a decade for these 10ga brackets to weaken, but you can spray-paint them before installation. I recommend Rustoleum Primer/Sealer (available at WalMart & others) or rubberized undercoating. These brackets will work with the factory steps, or with custom steps. I haven't checked yet, but they SHOULD work with the factory-look DeflectaShield steps or Centurion running boards.
To install them:
1) ensure the body mounts are NOT collapsed, and that the body is approximately centered on the frame. Broncos have the e-brake cable bracket directly below one of the step bracket bolt holes, so it may be necessary to remove a small section of the cable bracket.
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2) cut any shipping wires, and remove all fasteners except the red bolts. Retain all included hardware.
3) pivot the center panel upright (about 45°) as indicated. Spray-paint or powdercoat if desired.
4) remove the original brackets beginning with the 13mm nuts under the tubes. It is NOT necessary to remove the fiberglass steps from the body to install the new brackets, and working those fasteners may break their steel stanchions off the fiberglass steps.
5) remove all the original U-nuts from the original tubes and transfer them to the new brackets in the corresponding locations on the center panel.
6) If necessary, repair the 2 long studs on the steps by releasing the black step pads, drilling through the fiberglass above the damaged stud, and installing a new stubby bolt. The step pad will hide the hole.
7) position the small bracket under the rearmost inboard mounting hole on the indicated side, and install a short bolt upward (loosely) through the floor rib. The bent tab at the outboard end of the L can be adjusted to lie flat against the rocker rib so that its hole aligns with that rearmost slot.
8a) If the step is still attached to the truck: raise the new step bracket onto the step studs so it aligns with the body holes;
8b) If the step is off the truck: install the step loosely on the bracket, and lift them together;
8c) Insert the frontmost & rearmost bolts (loosely) in the rocker rib & center panel to support the new bracket.
9) install the remaining nuts & bolts (loosely), adding spacers to the long studs if necessary.
10) use the rocker slots to adjust the height of the step against the rocker; use the floor slots to adjust the in-out alignment of the step. Align the steps fore-aft with the wheel arches.
11) tighten all fasteners to the specs listed in the OE bracket diagram.
See also:
http://www.thedieselstop.com/faq/9497faq/tsb/tsb/95-08-06.php3 
