Van seats

I'm gathering up parts to convert my 1967 270 to a 1968 Super Stock look-a-like (kinda). As far as the A100 van seats for the front buckets, they are hard to find and expensive. Does anyone know if the later vans (1969 thru 1979 or so) have similar seats that I could use? They just need to be non-folding, low back buckets, mainly. I can get them recovered, if necessary, as long as the basic shape is there. Thanks in advance. W