Same here I just bought a 1992 overnighter and looking for jump seat cushions also. I just bought a pretty good replacement set for the front from Moeller in TN. They are not a perfect fit and you have to install different snaps but they work for me . Pretty good material also but are pure white ,not off white. I think if you google Moeller.com it will get you there ,, but jump seats cushions are tough to find. if you find some let me know. good luck
Dennis