Look for a civilian Alpha which in my (limited) experience can sometimes fit longer. For example, I've got a USA-made Alpha from the 90s (polyfill), size Large, which has a 25.5" back including knits. That's not very long. I'm 6'1" and it juuuuuust works for me, although I'm mostly legs. Bluntly, if you're 6' or taller, forget about these jackets, especially mil-spec ones which I never saw one longer than 23.5" or 24" when I was looking around for one. For due diligence, I suggest trying on one of Alpha's current brand-new N2B models which might (might) fit longer. If those aren't long enough, then forget about this style of jacket and move on to something else.