This is all I ever hear...since it's right on the line between the aeronautical and marine aid frequency bands, I thought maybe it would be listed somewhere.....I'll check the lwca guys in the meantime....
Edited: For some reason, I can't attach a zip file of a recording of the signal...if you're curious, PM or email me and I'll send it out...
Edited again: Wunclub has a file marked DGPS that's the closest match I can hope for based on sound alone...but then again, I walked under waaaaaay to many running Galaxy engines many moons ago...but many of the frequencies for the listed stations are all within a whisker of 300kHz.