I've looked online the past couple of days and can't find these glasses anywhere.
Looks like an Apero cocktail glass. Widely available in the UK. I didn't check shipping cost. A Jazz Sling glass is close but not exactly the same.
I thought I'd seen these at Crate and Barrel, but it isn't on their site. These are similar... search for Zweisel stemmed pilsner:
(PSA, though, Spiegelau does much more for your beer than this style beer glass will).
You all are the best. I didn't even know where to start looking. Thank you