id avoid the shack if i were you. i made (about a year ago) my own baybus out of the jameco 5w/100ohm pots and a 12.5w/25ohm pot i got through
Newark for my ex-cpu fan/jet engine. i went to the shack first to look for parts like those but all i could find were 1W/1kohm and the like. nothin over 1.5w unless you went for the rectangular ones, much less practical for a baybus.
but then again who knows, maybe your radio shack is more upscale than mine. at the very least, you could go to get some helping hands for soldering all those wires