There are DR Extra Life "Silver Stars" available here
http://www.juststrings.com/coateddrs...assguitar.html
They actually look bright silvery white. I don't think DR makes these anymore. Just Strings is the only place i've found them.
::edit:: P.S. I love DR strings
At last year's NAMM show, colored strings seemed to be the big trend. I saw so many booths sporting colored string displays, so they've gotta be out there somewhere...how they'd feel or sound, I don't know. They all seemed to be "no name" brands...to me.