If you're in need of more multiples, here's something to try. Visit Radio Shack. For each multiple, you will need: one 42-2156A Y-Adapter (with shielded microphone cable) and one 274-1556 Audio Coupler. Plug these together and add two ordinary patch cords and you have a serviceable Y-cable. The Y-adapter can be used with only one patch cord, but the two adapter plugs are on 3-inch cables, so they don't reach very far. The Audio Coupler is a barrel that allows two 1/4" plugs to snap together, for the addition of a normal patch cord.
-Richard Brewster