Yea I got sent these great pictures of this Supercharged JAP made by Anssi Kantonen in Finland. This is a quote about the bike:-
"The frame is homemade. The idea was make a slightly customed "Brough
Superior" style racer. The front end is modified from early British
Zenith. The Supercharger is AMR with S.U HS4 carb. The petrol/ oil tank is
also my homemade."