Thanks, everyone. I will take measurements the next time I have the wheels out. And I'll look for a co-op; the only cones on the Wheels site that looked roughly like mine were out of stock, but it may well be that another model would work with spacers, although at $10 a cone I could be down the road a ways to new wheels, and who knows, if I ride it enough commuting I may wear out the rims before the cones get re-brinneled. For now I'll see how my refinished cones hold up, and I hasten to note that I was not the author of the damage which, I agree, was likely the cause of overtightening. But I'll take steps to look down the road too.