I don't know if there is a replacement part as such. You would think so, but I don't know.
Coupla ideas. Take an inner tube and an Exacto knife and fashion one. Squirt some silicon gel in the hole, trim off excess after it dries. Set the time then cover with a piece of Scotch tape. Find an abandoned GTS at a junk yard or in front of a biker bar, take along a pair of pliers..... Ok, ok. Skip the last one. Shawn would be pretty PO'd when he'd come out of the bar anyway..... ;^) 'B'
