You might try Wheel Vintiques http://www.wheelvintiques.com/ They have quite a selection of the older style or retro wheels. The problem with 'deep dish' wheels is that there is minimal backspacing, so the rim protrudes outward, creating interference with the wheel well lip and rubbing the tire. There is not much of a demand for them anymore, but companies like Wheel Vintiques can still provide you with a wheel you're looking for.
Not to hijack the thread, but, Jim did you ever get that topper? If so, post a pic. Also, there's a vintage wheel dealer in Washington State that I've bought from before. Let me find his website and I'll post a link.
I purchased used dish mags on Ebay. I have 14x7, 14x8 and 15x8 for my 84 Elky. I had them polished up and they look great. Search my other threads on here and there are pictures. I have seen 14 and 15's that are 10" wide several times.
If you want new Ansen makes them and OPGI sells some as well.
Thanks for your help everyone. With your input and a little research on my end I have learned somthing. In order to get the look Im shooting for I would have to have tires that are one foot wide on the rear ! Im not opposed to that, I just dont think its possible without major modifications. If Im wrong please tell me because I would love to do it.