Thanks everyone for responses. Will attach rim pic once I figure out how. They're split spoke aluminum. I've indeed looked at virtually every online resource, including Les Schwab, etrailer, etc. None had my rims, but saw many others I'm sure are as good or better than I'd have to pay for OEM but at 1/2 to 2/3 the cost. I think the best approach is to view this as a sign from above to buy new but larger rims to fit larger tires. The OEM wheel assembly meets minimum specs but offers little/no margin of error re: load. I can go to 15 or maybe 16 inch wheels with higher load rating. Maybe the shop will pay a little sumpin' sumpin' for my 3 beautifully maintained and used only on Sunday rims. Hmmm? If not, the Craigslist idea could be a good choice.