But if all you have is one good fit from AE, we can't really help all that much. The point is that every last fits a good bit differently, and only certain AE lasts can be translated to very particular lasts of other manufacturers. With only one last to go on, you're asking a good deal. And in the end, if you want to assure a good fit, you need to put it on, which may include several exchanges if you can't get to a store of the maker you're considering.
Fair enough. I always feel bad about going in with the knowledge that I'll not be making a purchase. It can certainly take a long time to narrow down fits on multiple lasts. I suppose as long as I'm not taking away a sale by "deflecting" other clients who will buy, I'm not doing any harm.