Rear seats for Triton MK Club Cab ute

[Danno1]

Hi guys, I have bought a 2001 Triton Club Cab with only the front 2 seats installed (the rear seats have been removed at some stage). I figured (wrongly) it would be easy to pick some up from the wreckers. Can anyone advise me on (a) where I might obtain a set of seats and belts for the back, or (b) any other seats from other models or makes which may fit?
Thanks, Dan. Ph 0408 328 373