Hi there -
Though I am not Cambodian, I'm a giant fan of Khmer oldies. ( I made the video for Penh Jet Thai Bong Mouy that who put in one of your posts a couple weeks back.) I'm not sure how familiar you are with Khmer oldies, but let me tell you that there is a huge variety of songs in every genre you can think of, and some you can't, so you should not let the Cambodian Rocks series be the end of your journey. (However, if you want to ever know the name of a song or singer from those albums, I have all that info.) Also something to keep in mind - many, if not most, of the copies of songs out there have been manipulated by more modern producers, so they have added beats, usually not very good ones either.
While I sure don't know everything about Khmer oldies, I think there may only be a dozen or so white people who know as much as I do, lol. So if you ever have a question or anything like that, you can hit me up.