You need to be reeeal careful. The ones that fit the Geddy are not the most common size. Also, why not just go ultralights? Not much more money, and makes a measurable (real) difference as well as the perceived difference.
Basses: Geddy Lee, Jaguar, Fender PB-551, American Std 5-str P, Michael Kelly Firefly into Markbass LittleMark II to Markbass Traveler 102P x 2