All 2st foot peg interchange??

need some help, looking for big gnarly style foot pegs for 87wr. found a guy on marks vintage swap meet who makes nice stainless steel ones 81-84. anybody think these won't fit??? anybody know another source? also looking for oe style seat cover (prefer gripper type).

I have IMS stainless pegs on my 85, going to use them on my 87 too. I like them. Pro Billet makes even bigger ones that I have on my '12 310, but I don't know if the fit the '80's models.
Dave

ims said no but vintage iron has'em still not sure about the fit does someone have a 81-84 & a 85-87 and can look too see if the mount on the frame is the same?