A few years ago, I bought a Richie adjustable stem to feel better as I recovered from a broken fore arm. It took some weight off the arm for a few weeks till the arm got stronger. Even though I was wearing a brace for awhile, the normal stem angle caused some discomfort, and I didn't want to strain the repaired arm (plate + 6 screws). This was on a Specialized Allez. As I recall the adjustable stem didn't cost much (around $20) and was worth it to me. Give it a try. Specialized used to make adjustable stems using some kind of shims. My Roubaix has one, but it fits fine as is, so I've never messed with it.

Check ebay, lot's of choices, Richie and Specialized adjustables, $20 - $50.