Watch E-bay, I see them on there almost weekly.
And you can also get a new one here:

Bowtie parts has most Chevrolet vintage parts on the net, or close to it. Good people

I hope that helps.

Frank

No better smell than that of fresh paint. I've been building and painting cars/trucks for 47 years. Not gonna stop now.
http://www.coxcustomcars.com/