Cannon Escapes, is a good place to start. Owens sells them too.
HOWEVER, I say this because too many have hurt/killed themselves doing "escapes" without practice or pro-active personnel, under real performance conditions. A well known lock/escape consultant told me, he could not count the times the first time a performer actually got locked into a water-filled can/box/cell, was also the first time they were performing to a real audience! Most who buy their first ball & vase try it a least once before showing it to someone.