When I argue with these dunces, I end up feeling like the bad guy. I shouldn't.
One of my L.B.S's assured me that chainring spacers do not exist. He had just installed a chain for me, on my road double, and it was rubbing against the inside of the large chainring.
I e-mailed the guy I bought the crank from on Ebay (bicyclist's retreat) and he sent me 10 little, brass, .4mm spacers for free which worked (and still work) well.