The blued models are all early production guns. I don't believe there have been any blued Redhawks made in a very long time, decades perhaps. And I would be surprised to see any anytime soon. The Redhawk has teetered on the brink of extinction a number of times. It seems to be enjoying an uptick in popularity over the last year or so but had been dropped completely from the catalog for a while just a couple years back. When the Super Redhawk came along I think the intent was to retire the Redhawk but enough interest and demand has kept the product in production, though at times output is very low or on hiatus.
Your best bet in a blued 44 Mag Redhawk is going to be in the used market. Gun Broker, Guns America, Armslist, etc. may be your friend. Happy hunting.