It looks like I'm picking up a little 20w solid state Fender practice amp in a Craigslist deal today, but one of the knobs is jacked up (said his dog chewed on it,LOL!), and if it isn't a lot of trouble and expense, I'd like to replace it. So, I'm looking around for the standard skirted knob, with the little silver disc in the middle and the 1-10 numbers on the skirt, basically the normal black knob Fender's used on their silver-face amps since the Paleozoic era. Everything I'm seeing comes in 6-12 packs, or is ridiculously priced, with even worse shipping, or comes via the slow boat from China or Thailand, etc. Any help, or even a point in the right direction, is much appreciated !