I have a set of Trigo FIA knock-off wheels that I currently have Hoosier racing slicks on that I used to use for the Cobra. These are true knock-off, pin drive wheels and Trigo can custom make an adapter/hub for VW 5 bolt pattern. These wheels are 7x15 front and 9.5x15 rear both w/3.75 backspace. They are just sitting now in the storage shop and have been for 7 yrs since I quit racing.
This style of wheel was used by many race teams in the '60's besides Shelby American. Just an Idea I had. And for the hubs and spinners the cost is only going to be less than $350 plus street tires...way cheaper than even one VS wheel