Seized trailing arm bushing

So I'm doing the rear trailing arms on my P5. Passenger side was off and replaced in 15 mins...
Drivers side.... Well the sleeve in the bushing on the front end has become one with the bolt. I've tried heat, force and all the usual things. Don't want to get in there with a disc grinder considering proximity to the fuel tank. Somebody please tell me they have a better idea than lying on my back with a reciprocating saw and a dozen blades!!
2001 Mazda SP20 323
Oooff, been there, done that!

Loooots of penetrating fluid over a few days, and a good rattle gun should get you home, otherwise it's time to break out the recip saw!