Homebrew PCBs

> I need 2*10 positions, and can only get 2*6 or 1*12.

Electroswitch has 12-position switches that take a stop to reduce the
available positions -- you can use a 2x12 as a 2x10 by moving the stop a
couple of positions.  You might be able to get a free sample from your local
distributor.

-Alex