being that MK2 seats fit in an MK1 in size but the rails need to be redone or swapped, yes it's possible but you need to get MK2 rails on them. the only problem spot is the wear from where you get in and out of the car, but no rips or orther problems. see pics.
do you by any chance a have a crappy set of MK2 seats? perhaps you would wanna trade if you do, i have tought about reupholstering some seats myself and that could be a good opportunity (these were not in bad shape so i wouldnt rip them apart)