I’ve wondered if other 940/760/740s of the period would have the same seal, even if it isn’t the same length you could section it together. I seems like the same design.
But I’m wondering if the basic material and shape is the same, just different length. There is a 760 in a parts yard near me and I will pull the seal to see how close it could be. While it wouldn’t be as ideal as the original, I’m thinking it could be pieced together to create a complete seal. I’ll let you know what I find.