This is what I have now. The carb outside diameter is 44mm

Carb and Reed Block on re-worked Mugello 240

All a bit too squashed. Something with a foam top would give it more area to suck through.

The hole it has to fit in.

This might work but still a bit restrictive.
Is there an alternative to Ram-air. They seem insanely expensive for a bit of foam bent into a tube with another bit glued on top!