Help. Kobo Wifi directional pad.

I know that it's a bit of old kit, but this one was given to me by a friend and it has a great deal of sentimental value.

The directional pad at the bottom right has almost completely disintegrated, and I cannot for the life of me find a replacement.

I was wondering if someone had a kobo wifi that that had an intact rubber pad but had some other fatal issue that they could put up on ebay or something and I could by. or if anyone knew of one? or just a replacement pad?

thanks!