OKI Color Printer C3300

I have an OKI color printer. I need the refill for two colors - magneta and cyan.
I have to order the refill (powder) from OKI. It is expensive and takes a long time to come.
I am willing to try the power from other sources. Any suggestion on compatible powder that I can use?

For my next color printer, I will buy one that has a more available source of supply of the power or ink. Any suggestion?