T-nuts for Optics Plates

[giggitygiggity]

Does anyone know where I might be able to find T-nuts with a 4-40 thread pitch? Specifically, I am looking for ones as pictured below. As of now, I know that Langdon Tactical and CHPWS offers them. However, it would be great if anyone knew of other sources, to include hardware/construction stores, etc. Please post if you know of other retailers that stock these. Thanks!

 

[Walkalong]

http://www.altiusguns.com/product.php?product_id=21282

Foundation stocks has T Nuts that fit their Anschutz rails. I don't remember for sure what thread size, but I'll look, I think I have an extra one. I can check the thread if I do.

 

[jmorris]

Any of these work?

https://www.mcmaster.com/tee-nuts/thread-size~4-40/

 

[Misplacedtexan]

Maybe a hobby shop?