Surface mount shower control?

We're thinking of putting in a pocket door that will slide into the wall where the shower control and hot/cold water lines are currently planned -- is there such a thing as a surface mounted mixing valve? I know there are the surface mounted chrome bars with the hose/shower wand thingy, but I've never seen one with the ability to control the hot/cold water mix.

Otherwise I guess we bump the wall out an inch or something to accomodate the 1/2" copper lines?

 

Grohe makes one, I've got one installed, and there's a pocket door behind it! I used a hand shower with an adjustable height bar. The only thing coming out of the wall are the two supply lines. If you go that way, make sure you VERY carefully get the supply el's the right depth.

Now, I built that wall out using standard 2x4 lumber. I wouldn't want to try that on a thin wall using the thin studs that come with a pocket door assembly (unless your walls are not the common ones made with 2x4 studs; i.e., maybe a 2x6?). Depends on your feelings on style - I found it acceptable to have that section of wall thicker than normal.