i can custom make you a triple gang omeg ( or quad, quint, sexgang for that matter = oops i said sexgang)
you can have any combo based on the following 22k linear, 100k log, 220k log, 470k log.
each triple would be 10.00 each, plus shipping. or i would trade for 3pdts, switchcraft style open metal 1/4 jacks, stereo and mono.
the inside depth needed is less than a 24mm alpha, the triple stacks out to less than 1-3/8"
the pots are NOS from 2002. here is what they look like in dualgang form: