95 Deville Shift Solenoid Failure

Hello all, I'm new to the forum and just bought a 95 Deville Concours. I pulled the engine codes and got P029 which is a problem with the B shift solenoid. I heard this is a fairly common problem, anyone know where I can find an economical replacement?

Thanks

-D-

GM has an updated kit that fixes the problem. (2 solenoids a bracket and bolt)
The lower channel plate gasket should also be replaced during the repair.

Thanks a lot, I'm looking into it in the morning