robert, are you sure you want one? Like "have to satisfy a life-long burning desire" levels of want?
I had brief contact with a Wizard that I broke up for its suspension. It was the most horrid pile of crap I have ever laid eyes on or had the misfortune to cross the path of. And I've owned, driven and worked on a lot of horrid piles of scrap in my time. It has balls of filler as big as your fist where there should have been metal, bits "glassed" together where they should have been welded, cracks all over the shop from body flex. It wasn't a patch on an original full-roofed beetle. I was happy that the only place it went after my yard was the scrap heap. I brought it there myself just to be sure!! For example, the "shoulder" seatbelt point in the car looked like it was a solid part of the structure of the car but as I tore it apart, it became obvious that the entire pillar that the seatbelt anchored to was in fact fixed to the rest of the car by way of two big wood screws and a dose of fibreglass. If the car was in a head-on, the driver may as well not have been wearing a belt for all the use it was.
I'm not a purist at all, far from it. Just I think you'll have a very hard time finding a good one that's been built responsibly with structural integrity and safety in mind. You may end up spending the price of a good steel beetle on a tarted up heap of dung.
Beware...