.....as used on '69 side marker housings, '69 GTX quarter panel emblems and so on?

None of the usual suppliers seem to have them. There are some #8s out there but I need the larger #10.

Any known sources or leads?

Do not need to be exact original-appearing just have to function and it would be nice if they look fairly close.
I thought they were being reproduced but damned if I can find anything….

TIA