I don’t know if you want to go through the effort, (or if anybody does), but having all of the vendors listed by name, region, and offered materials. Region being important for many since shipping costs these days can be 
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That’s one of the reasons I love SCS so much. They are in Reno, only 4 hours away 
We are currently running a GLOBAL FREE SHIPPING promo. So, the shipping costs become irrelevant, FYI! 
Almost an year later after the request (I’m not that interested on custom keebs anymore, so I rarely come here or on reddit now), I added a flag of the country/countries where the companies are located and/or have operation facilities. Just in one case I had to use Who.is to locate the company, since they don’t provide that information on the site. And one of the sites is now dead.
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