Swapping Sportbike Lower Legs or Feet On XB Forks?

[absurded]

Currently I am running 2003 XB9R showa cartridge forks w/41mm stanchions/lower legs. I want to do a conversion to a super light front wheel with conventional brake rotor setup, without having to do a complete fork, tree, and stem swap. So, my thoughts are to just change the lower legs or just the feet to a comparable showa tube size from a sportbike. Has anyone done or know of this being done by someone? Thanks

 

[firemanjim]

The Buell racers did this a lot, used Suzuki lowers IIRC, saw them at Laguna Seca.