I think +POS has a grey harness. See if this link works.
http://www.pluspos.com/product.asp?which=263
Or, you can call Wilson. I did that last year because I wanted a black harness with the MLB patch on the back to match another one I had and they didn't sell it, yet. They sent me one for free with their complements. I see that they now sell the harness with MLB patch at Gerry Davis. I think Wilson listens to its customers. At the time I wore All Wilson or Gerry Davis gear. I now wear a Honig's K-1 CP but I am thinking of trying a WV Gold. Had a platinum and didn't like it. Had an original WV and my son now wears it and won't give it back. I wear black New View mask with black and cream shirts and navy Honig's single bar closeout with navy and powder shirts. I think the grey/silver mask would look good with black plate coat in early season. Maybe even with black shirts at night. What an equipment whore/fashionista I am. I KNOW that I am not alone in my addiction though.