mcfa (mitsubishi caterpillar forklift america) does not make towmotor anymore
the brand name is dead since the 70s i believe all towmotor designs became cats (422 etc)
mcfa now makes large frame ic machines for nissan and nissan make thes small frame ic machines for mcfa (ex: fgc25n)
from the history of mcfa web course i took as a mitsu dealer they never mentioned tcm
i believe you are thinking of the brand NYK (electric reaches and sitdowns) which mitsubishi imported for them until they had a falling out around the time of the joint venture(i think it involved mitsu getting narrow isle machines from raymond manufactured in greene, new york over NYK imports, but im not sure about this)
we still service NYK thru the mitsu service and parts system but if you need a part from overseas you might be in trouble (some lead times are up to 6 months)
i took the facility tour at mcfa about 2 years ago
when i get back ill be sure to ask to see the towmotor section (lol just kiddin)