It appears that Z1 enterprises has one set of Mikuni 29 smoothbore to Honda carb adapter intakes left. I used a set of them on my Rat Race 836 bike, and they worked great.
I ordered a set last night, stock showed two, and my set has shipped, the order shows they are the 005.026 Sudco/UPP polyurethane ones, there was the urge to buy them both, but no.
A set of VM29's are coming off of my Suzuki due to them having the Honda/Kawasaki 1.5 slides rather than the 2.0 slides the GS wants. Getting a set of Honda intakes seemed like a good move to go with the 29's.