48 volt Solenoids

I am looking for a 48v solenoid for my 2007 Ruff and Tuff cart. Right now I can drive forward but cannot reverse. The dealer I normally use says they re having trouble getting parts out of China. Any ideas of where to get one or is there another 48v solenoid that will work??

Any 48v F-R contactor should work.
Is it bad coil, contacts, or controller?

The controller supplies coils B- side, and coils B+ from the direction switches.