Robin, I doubt you will find a capo with shorter legs than a standard Ron Ewing. That is more or less the model these days.
And even though I was the one who proposed the hacksaw idea, I think Skip's suggestion is the less violent option. If you put a piece of hard rubber or soft wood or something, roughly the width of the fretboard, underneath the capo, you can get the same result without destroying the capo. I would try that. Some experimentation should reveal very quickly whether the legs of the capo will still have enough force to hold it down.
Dusty T., Northern California
As a musician, you have to keep one foot back in the past and one foot forward into the future.
-- Dizzy Gillespie