How/Where Can I Repair a Broken PCIE latch/retention clip

Hi,

I have an AsRock z790 PRO RS motherboard that is in good physical condition apart from a semi-broken retention clip on its main PCIE slot. I've looked everywhere for replacement parts or further guidance on how to fix this, but to no avail.

Can anyone help me find replacement parts for this and give me a guide on the repair?

Thanks