Does anyone know of any OTR Recordings of live racing broadcasts?

you got me thinking about how cool it would be to find an old formula 1 broadcast from watkins glen or the like... i did a little bit of searching and only came up with this:

http://www.myoldradio.com/old-radio-episodes/auto-racing-first-30-minutes-of-the-indy-500

Its the beginning of the 1949 Indy 500... enjoy. if you come across anything be sure to post back.

Woah! Thanks zamboni613; I don't know how this slipped past my hours of google-ing yesterday. I think that this is just about as good as were going to get with vintage US motorsports coverage. I haven't had a chance to look, but i think there may be some better archival (OTR) footage of some of the more popular European races; don't know how much luck I'll have with finding some with commentators who speak English. I'm anticipating a lot will be Italian, German, and French in origin. Thanks Again!