I've looked EVERYWHERE for Bernat Denim Style Rodeo Tan. It's been discontinued. Does anyone know a decent substitute for this?

If that doesn't work out,....you're going to have to substitute. Either the same brand, but a different color choice, or a different brand altogether. And that is probably going to require some digging. Remember, you want to try and stay in the same fiber content/weight/gauge family if you can. For bernat, this means  70% acrylic, 30% soft cotton blend/worsted (medium) weight/18 st to 4 inch gauge.

Use the yarndex as a starting point; with that you can find at least some brands of yarn that fit the same gauge as the bernat. good luck!

I was just as disappointed as you were to discover that the Rodeo Tan has been discontinued.  I looked all over and finally found an acceptable substitute.  I am currently making this project with Lion Brand Homespun in Shaker.  It's a multi-colored yarn with white, gray, and a little brown.  I thought this would work well to match the Sock Monkey, and am pleased with how it is working out.  I also used their Candy Apple for the red, and it looks real nice against the Shaker.