F8B engines are very common. Any Suzuki specialist should be able to source one with ease. Yes an Alto turbo setup will work on an F8B, but of course that comes with its own set of modifications and expenses. (As all good things do!)
5 speed options are limited to an import Alto, or Daewoo Matiz box, neither of which are a direct fit.
A point to note is that the Alto 5 speed has identical final drive to the standard F8B 4 speed, and the Matiz box is also similar. So in reality all you gain is an extra gearset to shift through.

(Which is the reason I have held off installing my 5 speed until the 4 speed shits itself)
Sorry if all this is coming across in a negative way, its just that after sinking close to idiotic amounts of money modifying my ute over the last 8 years I am ultra-realistic about what is worthwhile and value for money.
