The drivers would be Credence 10" subs from parts express. I believe credence builds RF subs but I could be mistaken on that one. The are just under $40 a piece. You can get the PR from www.Stryke.com (pre-tuned) for 60.00. For 140.00 I think it would be hard to beat. If you get a chance, get some measurements for maximum width and depth (front to rear of package tray) and I'll let you know how deep it would turn out.

I can also send you a more accurate drawing when i get the dimensions. One thing, you would probably have one of the more unique subs around.