We usually order our skins from the local diner.
Sorry about that, just a little skin humor; actually, you rarely find skin pieces on the market. All of the replacement work I have seen has been the pieces needed custom made for the unit unless it is a newer unit and you can have the piece ordered from JC. You might have luck in finding a whole unit but that would defeat the purpose. Hopefully someone else will step forward who will be more help than I was, but it was nice chatting.