Hey Vince, Keep perusing the eBay web site. I've been seeing the VDM banjo wheel popping up quite often lately. Prices are of course fetching in the $400-600 range for just the wheel. Keep in mind you must also purchase a horn button for an additional $80-$100 and maybe even a full horn ring if you're so inclined. There's one on eBay curently with a "Buy it now" option of $1195 Kinda pricey I'd say.
Also, when you eventually make the conversion, you'll need a few other pieces as well. Steering column, steering tube, turn signal switch, horn brush & column bracket just to name a few other required pieces. Then there is the size problem. If you've got legs bigger than 25", forget about the wheel. VDM produced these wheels in two sizes; big & bigger. Namely 400 & 420cm round. But it will distinguish your ride from all the other Speedsters around.