I just bought a Pacer, which I think based on photos I have found, is a 78 P-14. The seat is in bad shape and it needs to be recovered. I can't seem to find any covers besides the more common brands. Does anyone know of a place to find a reasonably priced Pacer cover? If not, does anyone know off hand if an aftermarket bicycle seat would replace it easily? Does it have the same shaft diameter as a bicycle?