paddle handle? If grasping- I was thinking an attached lever, short piece of flattend tube with a grip, Like the handle on my Mcclane mower etc. Too bad a standard lock set with lever handle couldnt be easily fitted.
Not what I was thinking but this might work- an open handle, would increase leverage, bolts on.
http://www.berger-tools.co.uk/series.asp?CategoryID=14&SeriesID=746There are simple tube handles tha bolt on , youve probably seen. Have grip, made straight, offset and open u shaped. But I guess I have wrong nomenclature because I cant find. Possibly industrial, McMaster etc.