Thank you all. As this will be one of those repairs done on the fly (literally, fly in and hope to be riding w/in a few hours!), I'm open to all options.

I do think that I will plan for a "proper" repair to be done later, when the bike is moved from middle USA to my current home. I'll do the drill and shim first and only if an actual refinish is considered, then perhaps replace the dropout with one from John (we'll need to chat, eh?).

In the meantime, it is so great to be able to get this kind of advice and feedback. I appreciate it very, very much.

Cheers to each of you!