The Deore/CR18 at REI is 135mm - you don't want to stretch that far.

Search through these and stick to 126mm - note some of these are cassette hubs, and others are freewheel hubs

You may have to go to Compass to get a cassette. Thought might find some on ebay.

whatever you put into this frame to make it functional - you will have that stuff and may want to move it to another frame some day.
But these frames are not dogs, they have good geometry for most riding, they're still reasonably lightweight, and they're built to last.
My best college buddy had a Mirage and it was every bit as good as my Grand Prix, which I've ridden 40 years (in four different forms).
You'll have one better than new, because you'll start with better components, and wheels define the nature of any bike.