Sadly Chinook are no longer in business having sold up in the mid 90s. think some of the molds went to Delta. Kevin Goulding used to run the company and is now involved with hotribs.
Should be no reason why you can't put a console into the rib, the build was standard marine ply and GRP. Fix it straight to the deck with S/S self tappers and Sikaflex sealant which will eventually set stronger than the deck! yes really.
Recently paid £50 (new £350) for second hand mariner throttle control box, but took a bit of finding with lots of calls to dealers etc. You will also need steering etc. For the size you are dealing with it might be a cheaper option to buy a kit out of a box (£90) rather than play about with second hand stuff here.
Have a chat to your local engine dealer for a manual on the engine. 2 cly 2 strokes are very simple great to learn on.