I've gotten a similar color out of Averland Sunset with a liberal amount of Agrax Earthshade wash. I use it as the shirts for my Orks so it's not as prominent, but it might be a decent enough starting point for you to build upwards with. For instance, try drybrushing the Sunset base with burnt orange of some kind, then hitting it with the Agrax to darken and dirty it into the tan.
Another thing to consider is directly mixing Sunset with an orange for that second coat. Sometimes, it's just easier to mix your own paints than to rely on the bottle.