So in summary, if you want a Hubbell duplex outlet which is hospital grade AND isolated ground, you would normally have to settle for it being orange. But if you are willing to wait as much as a few weeks for this made-to-order item, call a Hubbell distributor and order part number IG8300M2.
Just in case it wasn't clear, this part number will get you a white one.
Also, I just heard back from Hubble, and no other colors are available - just white and orange for the isolated ground AND hospital grade combo.
The part number for hospital grade AND isolated ground in orange is IG8300.
The part numbers for hospital grade but standard ground are:
brown: HBL8300
gray: HBL8300GY
red: HBL8300R
ivory: HBL8300I
white: HBL8300W
These part numbers are all for 20 amp outlets.
Here is the catalog search for Hubbell:
http://www.hubbellcatalog.com/wiring/
The step search is a very nice tool.
Don