The two prevalent 45 gram shafts on the market are the Accuflex Icon and the Graffaloy Prolaunch 45.  Apparently David Toms has one in the bag and has picked up 20 yards.  Not sure if Titleist is offering it in the mix yet, but for slow swing speeds it…

Its possible  if the fitter reps one mfg more then another . But stick to your guns because they can set up any club to fit your swing .. Casted  clubs i don't think can be bent to fit , just forged to set lie and loft.

neither, get s400's.