Do you sell three legged wooden mineral stands?

Yes they do carry them.

Yes, depending on where you're at in the valley, Jan Ross on 43rd ave & Thunderbird has them as well!

I saw some in glass last year August

I am not 100% sure if they do. You can give them a call and ask them if they carry them. I do not recall seeing them there but they do get lots of items in and have lots of items in the store.