Roger, welcome to FTE. Thanks for your insights.
Most people sooner or later realize that if you want to find replacement rubber parts that have any chance at all of fitting correctly, the best bet is to purchase Dennis Carpenter stuff. It is frequently sold by the other mass vendors, but my experience has been hit or miss on stuff from LMC, so I just go straight to the source to be sure. Much of DC's stuff is made from Ford molds and tooling.Steve.