DEC or Compaq Ink cartridges

Factual Questions
1

My sister gave me her 1994 Digital Series 500 (DECcolor Works Printer) and I need to find ink cartridges for it. None of the ones at WallyWorld look like what is in it. Does anyone know where I can find compatible cartridges? I think DEC is now Compaq, would those work in it?

2

Try:
http://www.image-control.com/

3

TY. I visited the site and emailed for more info.