Recommend a laser please

On my 1finity X50 there are four small threaded holes on the front of the router bracket, am thinking it would be simple to use them to make a bracket to mount a laser.
Can anyone recommend the best (low cost would be nice) laser cutter/burner that I could mount, or tell me why it is a bad idea
TIA Tony.

In the absence of any reply am starting to look at a stand alone laser engraver, the cost is less than adding a laser to my 1Finity and should give me the flexibility to run both at the same time.