Thanks to my Vietnamese friend at the Stamp Club in Saigon, I managed to get my hands on Vietnamese new polymer notes. I helped purchased for them lots of new ASEAN 2007 architecture first day covers. I also managed to get the Vietnamese ASEAN 2007 architecture series.
This 500,000 dong is very much different from the old paper note. I have been to Vietnam around 4 times, so I pretty much have their older paper notes. Luckily now I managed to get their polymer notes.