probably Best to go to eBay, see who is parting out a similar mimaki.
look for a power seller with multi0le listings.
choose a listing, use contacts/ask seller a question.
post a picture in the message
do a couple of sellers
CAUTION
if you don’t frame it as a request to have the gear presented as an eBay listing you
will be BANNED FOR LIFE. (They are a dramatic bunch, )
kind of like the way the orthodox will bury
an empty coffin because you are “dead to them”
but seriously, request just the gear, or the gear on a bad motor. AS A PRIVATE LISTING and they might send you a message wagging a finger at you, but this is how I get lots of hard to find discontinued parts
ask seller a question is the most useful part of eBay (especially if you buy machines cheap because “part discontinued”