If you have a DMP, you're probably using a ribbon? I used to just rewind the ribbon years ago, and that worked well enough.
I don't want to change the subject here but "rewinding"..............
Surely you didn't rewind those ribbons by hand, manually, twist, twist, twist, turn, turn, turn...huh???
I ask because I acquired a Canon Typestar 10 battery powered typewriter and the ribbon on that is completely see-thru at this point. I've checked it out thoroughly, it runs on D cells or a wart, but research indicates that the only possibility of finding a new ribbon for it lies in a visit to the Museum of Natural History and they don't sell items on display?
There are a zillion types of printer and typewriter ribbons around with a good possibility of finding one the same width as the one for that typewriter. With a suitable jury-rig maybe I could rewind a new ribbon into the old cartridge? what's your secret???
(my nephew brought that typewriter in..... he works for a moving and storage company and somebody they were moving dumped it. He thought he had found a laptop??)
Now back to our main program......
mouser has posted a link that I must check out.