Here’s the original Twin Twelve from JHS. It’s an emulator of the old Silvertone 1484 amp. Like a lot of amp emulators (including their Superbolt) it uses JFETs and an 18v charge pump. The schematic can be found here, and I added the charge pump from JHS’s Superbolt. Set the trimmers to around 9v and the adjust as need be. Pots are board mounted as usual and it should fit in a 125B with top mounted jacks nicely.
