Yep. I'm sure it will be back in stock soon.
http://www.therpf.com/f78/tony-stark-avengers-age-ultron-compression-shirt-238604/
Don't know if you guys saw this but it's definitely available in UK and France on UA's site as well as Widow, Cap, Hawkeye, and Quicksilver.
And it looks like it may be another custom. On the close-up, you can see it has a similar weave pattern, but it doesn't match anything I've been able to locate.