Helicopter Unit Costs

I’m trying to establish rough unit costs for the following helicopters-

Kamov KA-126
PZL Kania (MI-2 Evolution)
Eurocopter EC 175
Eurocopter AS 532 TT
Eurocopter AS 532 SAR
Eurocopter AS 532 Naval
Eurocopter EC 725
Sikorsky S92
Kawasaki OH-1
Denel Rooivalk

Any help would be really appreciated.