Nope, the only option that may be available is an extension kit for when the valve body is too far behind the wall, not something to fill in the gap from being out further than you want it. In either case, with or without the extenders, the handle and the trim plate are the same ones - they usually just send you a prettier piece to cover the longer stem.
I always recommend you mock up your wall thickness so you can put the valve where you want it, not just where it will fit. Believe me, though, this system is better than trying to get the rough-in positioned within say 1/16" like is the requirement on some Kohler stuff! Tile and thinset and whatever, it takes some really careful construction to get some of their trim to fit at all (not all of their stuff is this exacting, just some).