equinoxphotographic also sells a bellows repair liquid ..
i've never used it, but jeremy turned me onto
black india ink and pva (glue)
i repaired a huge bellows with that with great success ..
8 oz. water • 4 slightly rounded tsp coffee • 2 tsp. washing soda • 1000 mg Vitamin C
DONATIONS FROM THINGS SOLD, SEE MY BLOG FOR DETAILS
( both are active links )