Thanks for the replies. I don't have a service manual yet although I do have the engine manual. I've been using the shop's repair software but it's definitely lacking.

I've only got one of the 6.5" wheels so maybe it's a candidate for resale. I have no problem using the 6" version.

I'll post a picture of the aftermarket wheel to see if it jogs someone's memory. I keep looking at pictures but no luck yet.