RockAuto now has a listing for this: SKF Part # 199
Picture shows it as a rubber one. The last time there was ONE remaining, I had to cancel the order cause they were out of stock.

So, I think this is the way to go:

http://devestechnet.com/Images/Projects/Project1959235/Project59235430lg.jpg

I just hope they are ready for a run on them since the other company totally quit making them.

Deve

1950 Chevy 3100 Deluxe Cab
1950 Chevy 3100 Standard Cab
In the Stovebolt Gallery
The Think Tank
More info and tips at Deve's Technet