There seems to be three outfits that make them - Total Cost Involved, Heidt's and Fatman Fabrications (there may be others, but those are the most common). I'll not opine on the merits of one or the other (I have a TCI in mine and it hasn't fallen apart yet). WARNING!! Don't think the price of the kit is it; it took me about another $1,500 of stuff you need to actually drive the car after it's in (brake master, steering linkage, p/s pumps and brackets, etc. etc.)