FWIW, I got a set of rack ears on TB too, and was missing the screws. The fine folks at GK answered the phone and looked it up for me so I could pick up a set at the hardware store. I think they said 4x10, but please don't quote me. Point is, a call to GK by the new buyer will get you an answer. GLWTS.
Fender Jazz Bass Club #593 | Acoustic Bass Fetish Club #232 | Zoom Owners' Club #37 | Acoustic Amp Club #377 | GK Owner's Club #1009