Cobra Company makes a set of SOAR decals in the proper OD Green for black Spec Ops birds. Check out my Operation Gothic Serpent (Somalia) thread at Aeroscale for more info on Super 64.
Do a search here and you will find lots of info as well.
I don't know of any other decal sheets for standard Army Helo Drab Green UH-60s. Fireball Modelworks does a bunch in 1/35 for other helos though, mostly Hueys. Some of the generic Huey markings could be used on Blackhawks.
Good luck.
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