Not a track bike, but the only Fiberglass production bike I know of was the Bowden Spacelander. A very few of them were produced c. 1960. They didn't sell well, but...this is one beautiful piece of design. It weighed like a pig, but most of the newsboy bikes of the era did.

Picture cobbed from: http://www.artnet.com/Magazine/news/...ntm10-1-17.asp