Thanks guys, these are brand new leather skins I purchased and I rebuilt the seats entirely taking them down to their bare frame, new foam padding, horse hair and clips incl. cleaning all the electric motors. Its a fairly big job and a few weekends worth of work, but the smell and the "look" once the door is open makes it worthwhile. I've never attempted this before at home, but wasn't bad and if I can do it, anyone can!
Some progress pictures:
Yasin