There's a guy on ebay-- cardio-doc --He carries a lot of OEM Cadillac rims. I think all his rims comes with the option for Vogue mounted and balanced. Ive heard pretty good things about him and plan on buying a pair when the cash is around for it.
I know a site where i picked up a brand new set of 20's with tires shipped to my house for super cheap like under $1400. So i would expect 18's for alot less. Let me know if you want the web site name. BTW my 20' s are for sale if anyone is interested. email me [email protected]