DIY laser cutter bed.
Simply print the 2 part frame, screw or glue it with the net.
I buy the net at Leroy Merlin near my house but you can find it at Hobby shop anywhere.
The net i find at the shop measure 200x500 mm, I cut it whit paper shissors (200x300 mm) then glue it to the frame with super glue.
Enjoy it.