Cimarron stocks very few guns in nickle. Because there are so many models and variations on each model, you never know what someone is going to want. So when someone orders a gun nickled, they send it to Ford Plating to do the work.
Do you just want a shiny gun? I know a guy who takes every gun he owns, including rifle and shotgun, and strips off the blue and polishes them in the white. He does this with flitz and a dremel
They look great and he shoots black powder in them with no rust problems. Gotta keep them clean and wiped down of course.