When I listen to music in my old car I enjoy mixing things up with station jingles, public service announcements and commercials from the 40's and 50's. I have accumulated a few but am always on the lookout for more. Can anyone suggest a source for this material? I have got some from the Internet Archive which is a fabulous source, but there doesn't seem to be much there. It's hard to believe there is so little about, so I'm probably not searching properly. Can anyone suggest the appropriate collection/keyword?