Help with MATCO drawer slides- retainer clip

[Green Coyote]

Have a Matco tool chest from approximately 1993. It's 24" deep and a few of the drawers will pull out. I've determined this little plastic clip is what stops the bearing cage and drawer from coming out. Does anyone know where to find these clips? or something that I can fabricate to stop the drawers from pulling out..? Thanks! They're Waterloo slides- I've been looking for 2 days...

 

[Ton ton]

Have you tried reaching out to the local Matco rep?