Aw man, not that their machines were really anything special, but my printing journey started with their rebadged wanhao duplicator i3. Monoprice printers somehow made even creality look expensive at the time!

Looks like this printer is a rebadged flashforge adventurer. Monoprice also sells a version. You might be able to find a version of the firmware from one of those companies and use it.

Lol, so much for the instance’s only rule: “Be thoughtful, act responsibly, and treat others with respect.”