Looks like these guys have the Euclid studs. I buy a lot from these guys.
https://www.finditparts.com/products/3656713/euclid-e8961
Fleetpride has access to Euclid, but their people are too stupid to find them. Napa isn't much better. I buy over a half a million dollars worth of parts a year for my fleet. I buy just about everything online because I think all the people that could read a catalog have retired.
Dayton Parts has a lot of aftermarket parts. Here is a link to their online catalog. You have to run Adobe Flash to see it.
https://user-5lrz5xi.cld.bz/Product-Catalogs/Dayton-Parts-X-1-Interchange-2016-vp/48
