I checked the Kohler web site for 10" bowls and the color isn't available.
You may need to fix the old one, or move the drain.
The trouble with moving the drain, is that most likely, there is a real reason for the 10" rough location.
That's the sad part about the special colors, that don't always hold up. Looking back, there were some really cool colors, and then styles change and people quit buying the color. When that happens they become orphans.
Growing up we had an awful green bathroom and an awful pink bathroom.
Eventually those bathrooms were gutting and replaced with gleaming white fixtures.
I sell a lot of Bone fixtures in the Seattle area for those 60's home that had bone or almond. A lot of these homes now need new ADA fixtures and there are several that I keep in stock for just that purpose.
Kohler does have a nice tool for finding fixtures by bowl shape, height, flush, rough-in and color.
There aren't too many color choices for 10", or at least not as much choice as their full line, they still have quite a few choices for 10".
http://www.us.kohler.com/onlinecatalog/selector/selector.jsp