5" J-frame revolvers are about as plentiful as hens' teeth, so I doubt that you will find a standard production holster. Most volume manufacturers concentrate their production capacity on the more common models.
For general use in the field, at the range, etc I would recommend my classic Tom Threepersons-style holster, which I can make for your 5" revolver.
If concealment is a concern I would recommend any of my pancake designs.
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