For my '71 CB350 K3 restomod project I am redoing the seat with new foam and a new cover. The seat pan that was on the bike when I got was not correct for a K3 so I found a used seat on eBay. The pan was was badly rusted under the old foam. Rusted to the extent that you could see pinholes in the metal when holding it up the light. I repaired the pan by doing an Evaporust treatment and then covering the top of the pan with two layers of fiberglass cloth and resin. The result was a very sturdy pan. The problem I am facing is probably typical of these old seat pans, several of the small sharp tabs that are used to hold the seat cover were so rusted they were missing or broke off when tho old cover was removed. What I am looking for are suggestions on how to adequately secure the new seat cover in the areas where the tabs are missing. I expect to use contact cement in these areas but I believe that I also need some type mechanical fastening. Any ideas?