I think in every CDL and Arena Tour since 2004 you can get a glympse of them performing shirtless... in CDL04-05 I think there was this military-style performance and the dancers wore half-translucent shirts... in AT05 there was a whole segment where they wore these kinky leather+belts outfits... also, in a screen video for GAME from AT05 they show them running in a labyrinth, chasing Ayu, they wear the same revealing outfits...
But the best is already gone - Mitsu and Naoto seem no longer with her...
Anyway, here you go:
Not much but better than nothing..