I have been looking on here and surfing the net. I find the thicker stuff ,but not the half inch. Can anyone steer me to where I can find it ?

I have the thicker on my 62 C10 and the doors are hard to shut.
Luckily I can put it on my 76 C10 thats missing the pass door stripping.

1962 C10 with a 235 6cyl -- all of the drive train seems to be original.
Some of this story is in the Side Lot
Some people like a new truck. I liked the old ones.