I've gotten several e-mails recently about these, so I had the plasma cutter make me a few sets of parts from 10ga sheet steel (~1/8"). This is enough for 12 steps (6 pairs), and it all takes up less room than 1 fiberglass step would, without its original bracket. I plan to store them like this until they're ordered - it only takes a couple of hours to put a set together.
UPDATE: As of Sep, 2022, I have several laser-cut sets.
We're still working on the correct layout & table settings to get the engraving to look good, but it's not visible when the step is installed, anyway.

UPDATE: As of 2023, I have the small front & rear L brackets that connect the ends of the fiberglass steps to the body, and the bridges glued to the steps' ends for sale.