So after quite a bit of procrastinating I've finally gotten to the trigger/grip assembly;
This is the first piece, going to be used as a template to make others. 1/8" aluminum, cut with a jigsaw rough and then filed down to the exact dimensions.
I'm thinking I'll just rough cut the rest, drill and rivet them all together then file them down to spec as one piece.

( some rough cut pieces beside the template )