Basically any 12V laser will work on your Ortur as long as you can get it physically mounted. They all work in fundamentally the same way. For increased cutting performance the usual suspects are:
- Neje A40640 - dual diode
- Atomstack M50 - dual diode
- Sculpfun S9 laser module - single diode but thinnest focus beam
Both the Neje and Atomstack have a lot of optical power on account of the dual diode system. Sculpfun achieves cuts through having a tighter focus dot. Depending on your needs one approach could be better than another.