C15 Trials tank

[BOB M]

Hi - I'm looking for petrol tank for my C15 trials project. Does anyone know if a 2Gal BSA Gold Star scrambler catalina would fit the C15 frame. I've got a standard 3 gal tank but it looks too big for a trials bike. It doesn't even need to be off a BSA a Jap tank would do if it fits and looks the part.

Cheers
Bob M