No, I really don't. I just heard a dixie version of Midnight in Moscow several times as a child, my father had it in some collection LP, so maybe it was the same version. But I didn't listen to any version when I played this, it was by 'dixie feeling'. So I'm quite sure the improvisations of clarinet and trombone cannot be identical to any original. But certainly I had the idea of this song as a dixie in mind from havinv heard it as a child ;-)
OK; have a listen to this song and then tell me if it's the same LP your father had (...I am kind of embarassed now, because I still have this LP... )
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