eBay is best mate, early evo ones are foldable but aim for dc2 integra seats as are cheapest. Be super picky as are tonnes around and people will try rip you off! As Chris said need rails and this is the hard part I struggle to get some that fit. Not all Bride rails fit as I was previously told make sure you measure them! I found some Raptor ones by accident. Id suggest keeping a keen eye out for very cheap seats and an eye for rails. They come up on eBay/sxoc just have to be patient! They also do foul things in the car but meh! So comfy!