If I were you I'd do a takeoff-roof. My buddy did that with his s10 lowrider, and it's pretty cool. You chop it off in one peice and then put a seal on both edges that you chopped, and then you make latches to hold it together when you put it back on. That way you have a convertible that is also a hardtop.
I'd do that, but it sounds like you're looking for something quick and dirty.
* oh yeah, there are kits for this....dunno where though