I have just completed an Throttle cable kit for a 2T-G/Solex set up. $140 with exchange of throttle plate linkage.
I have been making up these kits for years and am in the process of doing so for the 18R-G/Solex set up. The kit will cost $140 plus postage and will come with fitting instructions.
If you are interested and can wait two weeks I'll have pictures available.