Yo man! We're probably doing the same thing... Â :D I've been looking for those as well and 10k, 50k and 100k are the only ones i could get hold of... (analog devices & microchip). Another one that's not available is 1K (not in PDIP anyway) but i hope i'm able to build one by linking the 2 tapers of a 10k together and make the total pot value 1k in software (same for 150K, 20K, 22K, 25K) But it would be difficult to make a 1Meg by linking 10x 100K together... Â :-/ Haven't found another solution either...