Proctor – information on rotable seat for Wireless Operator

Hello All

I am looking for photos/information/parts on the rotatable seat for the Wireless Operator. This is for my Proctor Mk1 rebuild project.

I have the actual seat (I think) but am very short on information on the rotating mechanism.

All help greatly appreciated. The drawings I have show the wooden structure on the floor of the cabin that the mechanism attaches and have a annotation “to pick mup turntable for rotatable seat drawing KM306 ref only.”

cheers
Ross