Just asked about colours, and his stock is quite impressive. Yellow, light purple, regular purple, pink, matte black, gloss black, white, gold fleck, silver fleck, teal, a few blues, a few reds, etc. His supplier's colour sheet has a large variety, but not all may be available immediately, and he has a MOQ for each to deal with.
Going to test on the plate mounted switches in my Leopold in the next couple days, make sure that the plate release tabs aren't affected by the lack of cutouts.