Are you asking about the whole thing or just the Grp mounded box?
If the latter: You're v unlikely to find someone selling just the box for your exact boat. Firms like outhill do have a range and you could browse their site and maybe get lucky. If the one in the pic happens to fit then ask that boat builder to supply as spare part. Or for something so simple you just make a use-once mould or get your boatyard/ local Grp mould shop to make the thing for you. I have lots of one off Grp parts on my boat and a good moulding shop would want say £700 to make that, as a guess. If that suits I'm happy to suggest a moulding firm who can make it from ( good) drawings.
All that said, I'd just fit throttles and thrusters, and forget the wheel. Then the job is much simpler