There is no such shroud to my knowledge. Suspect it would be a diy adaptation of the 4-cam shroud.
My choice of the Type 4 is as much to do with the exhaust configuration as anything else. There's a small weight penalty and a large pocketbook penalty over the Type 1 but the pipes coming out the bottom is a real advantage if you want it to look Carrera-like. Available displacement is just icing.
The budget for this would be ridiculous anyway, much of it wrapped up in that stupid fan shroud.