Recently decided to make a laminated stock for a newly-acquired Axis 243. I'm mostly finished the woodworking portion, currently working on the two metal parts needed, namely the magazine catch and trigger guard. Planning on making them out of aluminum stock.

Can someone with access to an aftermarket mag catch please help me out? Can even be a plastic catch, although I only need the dimensions of the upper portion if plastic is what you have, no need for the smaller diameter bottom extension. I assume that the main hole is 3/8" (.375") diameter while the bottom of the "well" has a 1/4" opening.

Photo below on the dimensions I need. My best ESTIMATES are: X= .900", Y=.540" and Z=.350" , I'm sure I'm way off, hence for the request for help. Thanks in advance.