I just had very good TrackMan numbers with a Kuro Kage Silver 60 shaft in a swoosh VR S Covert Tour driver today, but I can't find that shaft at your chart, too bad. 

Can you recommend me a shaft that are equal to that shaft in a 913D3 head from your stock-options or maybe non-stock?

It was a S-Flex I tried but I need an X-Flex. My club head speed is 115-116 mph.

Thanks!