Hello! I've gotten used to having my thumb on the chunky pickup which actually had a slot for it (on my Yamaha RBX-375), but recently I got a new bass, and i doesnt have nearly as much place on the pickup as the old one did. Question is - are there any pickups that may be installed on a Fender Aerodyne Jazzbass without having to drill new holes in to the body. For example that would use the existing holes for the picguard? Are there any other options for installing a thumbrest?