reading through the comments here the answer seems to be: good printers are cheap and nozzles are hard.

But how about the openwrt-approach? Keep the printer with the good nozzle and starting with the software such a cheap printer runs, trying to get that foss first - jailbreaking your printer if you will. Or swapping the board for a raspberry pi or similar? That would at least help against closed drivers, cartridge restrictions, page counters etc.