AMB's website is
www.amb-it.com
BBK is
www.bbksoftware.com
Buying the Robitronic system may be a false economy - if AMB is already widely used in Norway, people will have personal transponders which won't be compatible with the Robi system.
You may find a few AMB20 systems for sale occasionally, this is the old transponder system, it counts fine but does not support the AMB personal transponders. The bigger problem is that the handout transponders will probably have knackered batteries, they are not user replaceable so service cost is high, although MRT (
www.team-mrt.com) do make some AMB20 compatible personal transponders.