Have you considered doing an older style 16 or 17 inch stock 8 lug steel wheel for older conversions? I like the floating axle idea - something that is missing many times. A lot of commercial vehicles were of the one ton variety back in the day including some tow trucks that I have seen that actually ran single rear wheels.
Another need that you might consider is a proper looking 16 or 18 inch one ton wheel for older trucks. I've seen a few posts where guys are trying to source a wheel for a tow truck, deck truck, old farm truck or other commercial hauler/work truck build and they want a decent looking older style wheel. There were six and eight lug versions and I think that once the word got out on the forums, you'd have a decent market. And even if it was just a generic wheel that an expert could look at on a Ford and say that the wheel is a Chev wheel. Split rim or solid would be a nice option as well. Another item that may be of interest of just the floating rear axle that could be inserted into a wheel if the center was drilled out to give a truck the three quarter or one ton look on a custom wheel. Just look through the current and past auctions on Ebay and see what guys get for dual wheels from newer one tons and how many dually lits that are offered without the duals because someone bought the kit just for the wheels. Alcad makes making a wheel pretty much resemble chrome, but many vintage style builds call for painted wheels, so uncoated resin would be a blessing. I've seen 1/32 big rig duals used on one tons but they just do not look right. PLEASE - PLEASE - consider these requests.
I know that I have been looking around for an old style 16" steel wheel for a project and I can't find anything. I might add that tires in both summer and winter tread in a 6:50 - 7:50 size would also be very, very welcome. I'll be ordering some of the 2 WD wheels if they are ready and I'd sooner just buy from you than through Ebay. I know that you can't just cross your arms and wiggle your nose or blink your eyes and the molds are ready and that this all requires more time and work than the unitiated realize, but this is a market that has really been overlooked. When I read of guys using Danbury Mint trucks for just the wheels, that suggests that some people are pretty serious about this need. And ask yourself how many guys set a project or a dream aside because they can't find the right style wheels and they assume that they are not available. Were these wheels available, some of those guys at least, would be willing to buy them. Just food for thought and some things that you may already have considered, but perhaps are worthy of second thought. I may have overlooked a source or two that is out there, but competition is not a bad thing and it looks as if you produce a very nice product.