YMMV, but in my experience, the "eccentric loading" protocols for tendonosis work like magic -- I do a lot of climbing, and found this invaluable for clearing up elbow tendonosis.
This is a guide to using it to treat elbow tendonitis/osis -- oriented towards climbers, but it should be possible to adapt it to meet your needs:
Unfortunately it doesn't detail the exercises used, but only refers to "exercises that stressed the knee extensor mechanism in an eccentric mode only" -- should be fairly easy to work out, though.
no subject
This is a guide to using it to treat elbow tendonitis/osis -- oriented towards climbers, but it should be possible to adapt it to meet your needs:
http://www.athlon.com.au/articles/r&i_dodgyelbow.pdf
This is a good blod post from Dave MacLeod (a climber and climbing coach who has a master's degree in sports science) explaining the research basis:
http://www.onlineclimbingcoach.blogspot.co.uk/2011/02/golferstennis-elbow-etc-what-eccentrics.html
This is an article on the research basis for using eccentric exercise for patellar tendonopathy, with a case study:
http://ptjournal.apta.org/content/86/3/450.full
Unfortunately it doesn't detail the exercises used, but only refers to "exercises that stressed the knee extensor mechanism in an eccentric mode only" -- should be fairly easy to work out, though.