It was a standard model until recently I haven't seen it on the Japanese website anymore, but there's an ltd 7 string viper with emgs still up on the american website :)
Really a floyd styled bridge?? sounds Kewl!! Yeah ESP had a standard seven string baritone VP the only difference with Kaoru's was the pickguard... BTW his custom DKV is the only viper I really like, the beveledness on the inside looks so nice live :)
Kaoru used his old seven string ganesa for the following songs Deity,Zomboid,Karasu, Gyakujou Tannou Keloid Milk, and obscure that ive seen so far.... hope this helps My Fav Seven Electric Sound Products