box for 2 12's?

[black02mustang]

Does anyone sell a cheap/inexpensive box that will fit 2 12's for a mustang? I am working on a fiberglass enclosure, but I want to have some bass until I get it all done, and don't want to build one if its just temporary (carpet/glue/etc). The subs are punch hx2's 12's. I also bought his jbl 1200.1 amp. I helped put these in my friend's car couple of years ago, and he just got rid of his car so I bought everything off of him for pretty cheap. Just trying to get something temporary until I get my box designed and finished.
Thanks

Edit: Sorry I drive a 2003 MAch 1. It still has the amp rack etc in the back, and I don't really care how they are firing right now. Just don't want the subs sittin in the garage where they might get torn up or stolen.

[NeedleSharp]

wut do u think inexpensive is? lol and how long for the fiberglass? i do custom boxes and shit on the side and i can jus make u a regulare ported box for about $75 (w/o carpet... i can paint it for ya... waiting for shipment in about 3 weeks!) or i can build ya a custom box to fit in the back of your trunk for about $150-$250... plus, im pretty sure i can always just get you a dual sealed Pro Box for about $150... pm me if ur interested