yup
there are several
my favorite is MPFreaker cost $20 or so
free (i think) is jaikoz but I couldn't figure out how to work it
there are other i know (i think one is called something like coverscout or...??)
of course you can always do it for free manually through iTunes or for that matter let iTunes make a half-a$$ attempt at finding you some cover art, good luck with that.