Just thought I'd update with my solution, an HDPE replacement made on the lathe. It's not perfect, it's generous in all dimensions, and it was annoying to make out of sheet stock, but it works.

Pushed in, normal position http://www.botmedia.vrogy.com/ned/benz/300D_01.JPG
Pulled out to show new bushing. http://www.botmedia.vrogy.com/ned/benz/300D_11.JPG

I am going to put a shaft collar on the end of it to keep it from being pulled out at all. I hope that shaft is 8mm- I just happen to have an 8mm shaft collar.

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1984 300D Turbo Diesel - 211700+ mileage (now sold)
http://www.maj.com/gallery/Ned/benz/sig.jpg
In any of my posts, it is safe to assume
that I'm talking about this car.