Only seeing this now so apologies if it's old news to you. There was some mudwrestling on the show "Modern Marvels" in an episode titled "Dirt" from 2010 (season 15 episode 2). The only place I see it online is on the History channel's website, but you have to sign in via your cable provider and it's not really downloadable
I did make a lo-res (sorry) capture of it off my TV (see GIF below - 13.8 MB), but I suspect YouTube's content eye would zap it since it's being sold on Amazon. An interesting tidbit from the owner of the Chicago Knockers: when they took their show to England, "Their top soil was so rocky we couldn't use it. We ended up having to use chocolate cake mix."
I'd say save your money. The whole "segment" is less than two and a half minutes with less than half of that actual wrestling. I went ahead and put the bulk of the remainder in the GIF below (17 MB -- excluding another 10 seconds or so of jump cuts at a fair where there may be kids in the background). But it is also nice to hear the ladies talk about it. Julie says, "I grew up playing and working on a farm, and playing in the dirt." Christie says, "No big deal for me to get dirty. I was raised in Clinton, Mississippi on a catfish farm. I grew up living in the mud practically. Funnest times of my life." The reason I made two panel GIFs is to make the jump-cut (and my lo-res) nature of the scenes more interesting.