If you're an E width, start with the Forest, Rain and Inca lasts. I'm a 12D in my AE 1 and 5 last shoes with a foot that is too wide to do any of the narrower AE lasts, and I go one full size down (11UK) on these three Carmina lasts. The Forest last fits almost identical to a D width AE 5 last shoe, but is slightly more narrow. The Forest last is very forgiving, though, as it has a high instep and toe box with a round toe. The Rain last is a little wider but a fairly high volume shoe for those with high insteps. The Inca last is even wider still, but has a low toe box and low instep.
So I guess the inca in 7 would be a better bet? I'll try seeing if I can scoop some used ones in my size sometime to try on and figure out.
The long game. Sigh. haha.