913D3 Tour AD Di Shaft

How much is the up charge for the tour ad di shafts for a custom 913D3?  The catalog with the custom listings only says up charge, no price listed.

And also, does anyone know why the titleist knit headcovers are not on the website?

Thanks,

Dan C.

I am sure it is different everywhere, but I have never seen an upcharge less than 300. It is usually more than that