First off, I do not think those are shell cordovan. I think the 9107 is black polished calf. There are some ripples that would lead you to believe they are shell, but there are also many creases and wrinkles which tell me this is leather, not horsie... Also, this does not have the sole/heal combination that would go with shell cordovan. Even if I am correct, that price is not bad for a par of quality macneils. As for recrafting, and your question about stretching, ask away with the recrafting specialists at AE. The worst they can say is no.
+1 not shell cordovan. Those are "corrected grain" or "polished cobbler" in AE terminology. Not bad necessarily, but definitely not shell cordovan.
As for the stretching question, Many find that they need to go up a size in length on the 7-last (Macneil last) due to the sizing issue you found.
UGH. AM I NEVER SAFE FROM CORRECTED GRAIN?!
now the wait for the return. What a waste of time!! :(