In the spirit of sharing, I've got a couple of Bruder conversions in the works that I have been gathering parts for. I found these on Ebay, but haven't bought any yet.
https://www.ebay.com/itm/19421147090...evt=1&mkcid=28
They look to be about the right size, the Bruder tires that I measured were in the 75-77mm range.
Don