Recommend a fast recharge flash for my Fuji S602 camera

The built in flash on my Fuji S602 camera is painfully slow to
recharge, EVEN WHEN CAMERA IS EXTERNALLY POWERED (from an AC
adaptor).

That makes for some painful waste of time when making many pictures.

Would anyone recommend a good basic flash unit for it that can make
flashes at a very good rate. I can live with it needing external AC
power.

thanks

i