Hi Tom:
Thats a new one on me. Supreme huh?
I just looked at the site:
http://www.thetford.com/permanent_main.cfm
I didn't see that model either. I talked directly to a service rep rather
than using the website. I bought several other parts too. The phone number
on the parts invoice that I have is in Dexter, Michigan: 734.769.6000
Sure it's a Thetford?
GQ '67 Safari
4082 in CA
PS: The replacement package included the floor seal