Yes, as I said in my first post, Ruger did sell the Old Army grip frame in blued carbon and stainless steel. Don't know where CraigC is coming from on this. Here's a link to the production lineage of all Ruger handgun grips:
Ruger Grip Frames on Gunblast.com
and here's a schematic of the difference between the XR3-RED, XR3 and Super Blackhawk grip frames:
This image was originally posted by CaryC on Rugerforum.org.