Here is a replacement screw kit for all Metric IPSCALEX scope mounts and thumb rests. EAA and CZ is what we are talking about. It's not always easy to find metric hardware in North America, so here is the solution:
8 pieces M4 x 7 Screws
2 pieces M4 x 12 Screws
1 piece 1.5mm Hex Key
Choose from black or stainless hardware.