I have a VM Jaguar Special with the HB pickup instead of the P/J pickups, photo attached. I am wanting to change the pickup, but haven't been able to find replacement pickups for it. Seems almost like a Musicman HB except for the MM has 3 screw setup for mounting and this one only has a 2. Could it just be a different pickup cover? Also, in regards to the electronics, the treble pot doesn't really seem to do anything for the tone, just adds background noise. Is there any replacement electronics for this guitar?