We've never seen it. A lot of stative verbs have {-Ha'}, so I'd probably be more inclined to accept one of those in the Q-spot. I'm not sure how I feel about {-be'}, but then we don't know much about what verb suffixes can be used in the law'/puS construction. For a meaning like your sentence, you can negate the law'/puS verbs themselves, see:
http://klingonska.org/canon/2004-03-holqed-13-1.txt
{tlhIngan Hol mu'tlheghvam tIq law'be' DIvI' Hol 'elaDya' Hol joq mu'tlhegh tIq puSbe'}
which would mean "This Klingon sentence isn't longer than the Greek and/or English sentence," in other words, that it is shorter or equal in length.