You weren’t really trying to have an authentic French bistro with glassware that wasn’t French….were you?
Be authentic. Use the real thing. Get in touch with these folks from Duralex. Yes. it has all the thermal properties. Yes, it will hold up in foodservice use. And, yes…it’s stocked here in the U.S.A.
Your customers will know the difference. Duralex’s Picardie glassware is an icon of the French bistro tabletop. 
Go here to see the entire line of products from Duralex USA….stocked in Delaware:
http://food-service.duralexusa.com/
