Theres one option you might try, measure the rear bench seat out of a early full size blazer/jimmy. My friend used one to replace the bench seat in his 54 willys truck and it fit perfectly.

84 CJ7 304 HEI 35 BFG,s rear dana 60 with detroit locker,Viar compressor, fibreglass body, 2 1/2 spring lift, TF999auto, Warn 8000 winch, Plus a cool little trailer on 35,s. JEEP stands for just empty every pocket