Find a Postscript compatible color laser with a print server that supports Appletalk. On the Mac, install Adobe's generic postscript driver and use the PPD that come's with the printer's driver packs. HP also made a "business inkjet" line that had the above built in, but they weren't the most reliable machines.

Elfen, which HP printer/cartridges are you referring to? The older 25A and 26A cartridges that the 550c and 560c used are still available.

https://www.tonercartridgedepot.com/hp-51625a.htm