Q&A: Where to buy an actual old fashioned glass?

I’m obsessed with barware and I have come up dry on this (bad pun intended). It seems EVERYONE sells “Double” old fashioned glasses – which is fine if you’re making rum and cokes or something…but I want to make drinks that have less volume and they just look silly served in a double old fashioned. Anyone know where to buy a 6 ounce glass or so?

Thanks