There are numerous threads about pot replacements in the Crack folder. Do a quick search on "pot" or "attenuator" and you will probably find a hundred hits.
There is a PEC pot that is popular, there is a TDK pot, Goldpoint attenuators, Bent Audio attenuators, attenuators from Varlab (can't quite remember the name) and handshare electronics on ebay.
The word is to buy discrete resistors not SMD resistors. The leaded resistors sound the best.