This is as close as I can get:
https://www.libertytreecollectors.com/productcart/pc/viewPrd.asp?idproduct=4809&idcategory=66
-or-
https://www.gunpartscorp.com/products/330
I assume this one is stamped as well:
https://www.apexgunparts.com/rifles/bolt-action/french-mas/french-mas-36-front-end-cap.html
You might want to email Bob's:
https://gun-parts.netc.com/index.html/
Beyond that, I would not know where else to try. Good luck!