Dan M
My post stated -
"Contact the supplier or dealer"

I fully understand in "most" cases that if an end user would attempt to contact the OEM they would be provided the name & contact information of the nearest servicing dealer. If there wasn't a local dealer within a 3 day crow fly - most manufactuers would help (I did when I was with 3 significant manufactuers).

And I am fully aware of many of those "rules of thumbs" after 41 years in the truck industry that folks use - that wouldn't hold water if something happened - at least in the courts on this side of the border. Have had to provide depositions a time or two.