Hm. Closest to exactly what you're looking for was in a Jason Statham movie (Transporter 2, maybe? They're all kinda the same) w/ a brief lobby scene of 2 girls performance-acting something about tar pits. It was literally seconds long, but if that's what floats your boat...here's pix. Maybe there's some behind the scenes stuff out there? Seemed a shitload of work for the use they got out of it.
There was an episode of Silk Stockings (US, Police Procedural, USA Network, mid-90's, 1-feamle, 1-male lead) in which a mud wrestler was murdered.
The episode features "mud" wrestling, although it was really like red slime between women, and when the male partner took down the fleeing villain, the fight was in a mud pool.
Side notes: The male partner was played by Rob Estes. Also, after he beats up the bad guy, the female partner steps in to the pool to arrest him, but gets her stiletto stuck in the mud.
Love you, too
