You must be mistaken. Everybody knows Garak is a plain and simple tailor, as he will cheerfully tell you in the face of whatever evidence you might provide to the contrary.

Not sure what specific screws are used for that piece, but as far as I know it’s mostly metric M3/M4/M5 screws of various medium lengths in the 5-20mm range, so you should be able to basically eyeball it, get a box that contains a few of reasonably close sizes and try some until they fit.