I got both the seal that looks like a sideways squashed donut and the rubber boot from LMC truck for my '56 GMC . There is a metal piece that goes under the seal, also oval. Both of my originals were long gone 31 years ago. BTW, on the handle, does the release spring sit over the handle bolt or does the bolt go through the eye of the spring?

Well, my time went so quickly,
I went lickety-splitly
Out to my ol' 55.
As I pulled away slowly,
Feelin' so holy,
God knows, I was feelin' alive..... Tom Waits, Ol' 55