If anyone is looking for them, cip1.com is having a wheel sale.
They call them 3-fifty-6 wheels, but we know them as Vintage 190. Aluminum copies of wide 5. 100 for 4.5" and 110 for 5.5". Free shipping. That's a really good deal if you're in the market.
They also have the same wheel in 17 x 7 with 20mm backspacing. It weighs 18 pounds(as it should, that's a lot of metal to make a big wheel) instead of 10 pounds for the 15 inches. But for $180 a piece, one could put 215/45R17 sticky tires on there and hoon very well indeed. If they clear the trailing arm....
There is no way to fit them on the front of a Spyder, but if I could, I might. The back would fit with 20mm spacers and LONG studs. But, the front limits things.