Drouin Supercharger

>
> i have got a related question, anybody tried the small aisin
> superchargers?
> i am looking for a small supercharger to use on a 650 cc twin, .
> the smallest aisin is fitted to the subaru vivio, ( 660 cc) to should
> be a pretty perfect match.  
> but i havent found anybody who stocks them over here, the small vivio
> is probably only sold in japan.
> They turn up on ebay ( australia) every now and then , but it would be
> nice to know what i should be looking for.
>  
> cheers,
>       Hubert