My 50W Omtech Polar Plus (since discontinued) can do 3mm in one pass and 6mm in two passes (or one pass near max power but I prefer two for reduced charring and to extend the lifecycle of the laser).

Basically any 50W Chinese laser should get you what you want. But at that price point you can't adjust the mirrors, no red dot to guide cuts, poor camera calibration etc. It's worlds away from what I expect you get with an Epilog.