Im guessing that these levers are either hard to find or expensive. What I did was have some new cables made with different nipples and then use Jap levers off an RD/TY/YZ. I believe you may be racing this 2C so you should consider what goes in your crash box as you'll need spares. Also if you use general fitment stuff and have a prang some good soul in the paddock will have spares. Put it this way. If you drive all the way to Angelsey and the bike falls of the stand and snaps a lever that's your weekend done.
Whats the plans for for next year with the racing? My 2C will be out with the BHR who look to have a pretty good programme planned