H.N.
I think this is what Blu's is referring to...
http://www.amazon.com/b?ie=UTF8&node=3407871
I love me some foam roller! I really does release the built up charges/gasses from synovial fluid in the joints (cracks and pops) and stretches the trapezius and latissimus dorsi muscle effectively!
If you end up investing in a roller, you can look up exercises/stretches to target your problem area on youtube.
S.C.