I got away from dot matrix and got an HP LaserJet 4 for my first A500 around 17 years ago. Funny thing is, even though I sold that computer years ago I still have the printer, and if I boot one of that A500's WB discs, there it still remains, set as the default device. 
I used a Canon BJC4000 series printer (they made a few in the 4000 series) which worked well with TurboPrint.
You can refill these ink cartridges too, with generic printer ink refills.
However, the electronically activated inkjets in the cartridge heads wear out over time, so you'll get a good few refills out of them, but eventually it may become hard to track down new ink cartridges.
Ribbon printers are good, because often if you cannot find a replacement cartridge, the actual cloth ribbon inside is standard width, so you can just buy a ribbon cartridge for some currently supported dot matrix printer (yes, there still are for business purposes) and crack the two ribbon cartridges open and do a "ribbon transplant".
I know this because I'm a VIC-20 user as well - and getting ribbons for old 1982 era commodore printers is even harder.
