S&W actually did a "black" Model 19-5 for the Diplomatic Security Service and also for the Connecticut State Police. They are not seen every day but can be found. The finish is more black than the original blue and came with Pachmayr grips from the factory.
I was luck enough to find one at a LGS who thought it was a refinish that came out too dark. Not perfect, but not too bad for $250 OTD.