Hi Sav. Rotorspot is the site to look for if you want to check up on a particular registration. It covers pretty much every country and is a great research tool. Here is the entry for N9000A and it confirms the info in your post.
"N9000A Sud-Aviation 341G Gazelle > 342J 1470 N9000A,HB-XMU,F-GIBU"
Sadly, no details on operators.
500 Fan.