4 5/8

Hi! Isn't there a Wilson Pro Staff 97 with grip 4 5/8? I just found the RF97 with 4 5/8, but this one is really heavy for me, I prefer the 315 grams version. Where could I find it? Thanks! P.S.: I'm not a big guy, but I like to remove the cushion grip and play with 2 overgrips in a 4 5/8 Wilson...