Here's a link to his site:
http://www.drdemento.com/
I tried getting the station list for the stations that carry his program (he states on the site that he's still airing on over 100 stations), but the station locator is no use (pop-up city), and he even warns that the policy of the network prevents him from listing the channels (HUH?). Maybe enter the state you live in and "Dr Demento" and that'll hook you up. Hopefully you could even come up with a webcast of it, lot's of stations do that these days.
Maybe I'll make that my short-term mission in life, find a webcast of Dr Demento.......world hunger will have to wait!
Gilly
PS There is a catalog of albums (I assume tapes and discs) on his website, i also believe "Rhino Records" use to make his stuff. The album with the Scotsman song on it I know was by Rhino, and I think it was called something like "Dementia Royale".