Rear Engine American Racers. One the original Vintage Karts sites. This is for the Rear Purist. Lots of great info and a really good Forum. Certainly worth a look!
Azusa Engineering. A great source of parts. Australian agent is Graham Powles.
Perfrormance MetalsLooking for the raw materials to rebuild that Vintage Kart frame or are you wishing to build a replica? Give Perfmance Metals a call.... they have really great prices on Mild Steel and Chrome moly Tubing in all those hard to get sizes! Karts and PartsKarts and Parts.ca is a really good sources of bits pieces. Mac Motor part and some European Motors as well!