Quality Replacement M-LOK Hardware

[endangeredspecies]

I mounted a Spartan tripod adapter and BOG ARCA rail to the M-Lok rail on my PH3. After taking it to the range, I decided I wasn't happy with the location of the ARCA rail and went to move it - and the socket drive on the screws stripped out. I have the tools to drill it out, but will need replacement hardware. Based on this experience, I don't want to get it from BOG.
Is there a known good / top quality source for replacement M-Lok T-Nut hardware?
The Spartan stuff is quality, but I don't see replacements on their website. I'm not going to trust my next Elk hunt to Amazon hardware.
I see Magpul fasteners out there, and it looks like Salmon River sells replacements, too.
Anyone have experience / use / opinions on using and re-using M-Lok hardware from either of those guys, or know of a place to get great quality steel M-Lok T-Nuts and screws?

 

[endangeredspecies]

I bought a set from Salmon River. Also inquired with Spartan Precision, and they sent me out a set! Above-and-beyond customer service there.

 

[endangeredspecies]

Answering my own question, after removing stripped screw with a TORX bit and impact driver, turns out the BOG rail is countersunk, and their M-Lok screw is flat head. Spartan and Salmon River both supplied pan head (as is standard.)
I finally submitted an inquiry with BOG. They don’t stock hardware separately, so are looking at sending me a full replacement rail. Which is great, but excessive. And they’re out of stock, so it’s back-ordered. No idea on timeframe.

I found some properly sized replacements on clearance at an industrial supply house. Had to order a pack of 100, but they can’t confirm Class 10.9, so I’ll toss and Replace fasteners if I need to move/remove/replace the rail again.