Here's an update, because this has been playing out, daily, in such an annoying fashion.
I took the wheels to a machine shop in town and, when we had the wheels and my spare (for centerbore reference) in his shop I asked the guy, 'so how much will that be?'
'Oh, not much - figure $40-$50...each.'
So that wasn't happening.
It turns out that I can probably fit the wheels on - with no machining necessary - by using spacers. I'll need them to clear in the back anyway. Will the Justy's studs be long enough? I
think so, but since I had to go get some (a couple have turned out to be stripped - thanks a ton, Sears) I'm a little worried looking at these things. I mean, they're only an inch and a half long.
I'll let you guys know how it turns out. This is really becoming a pain in the ass.
