Just released a driver (compatible with Linux/macOS/Windows) to print PNG graphics to a Commodore MPS 803 compatible printer, without using a Commodore 64/128/and so on...

It uses opencbm for sending raw bytes to the printer, through XUM1541/ZoomFloppy.
I called it cbmage.

Here are source and binaries:

In the README file there are detailed instructions.
Have fun!