Just did a web-search for the Vegas DVD at Norwegian recordstore Platekompaniet. You can order a copy for NOK 229,- (US $ 30,-) and it states that the DVD is Sone 2.

* Originaltitle: Prince - Live At The Aladdin In Las Vegas
* Sone: Sone 2
* Picture format:
Fullscreen 4:3
* Sound format: Dolby Digital 5.1 English

Unfortunately they do not accept international orders, but I thought you'd like to know.