DontGet vs. already got but just don't want more

I put .wav's in DontGet because I don't want anymore. They tend to
sneak in on those music infested homepages or something.
But now even wwwoffle -o can't squeeze one out of the cache for me for
just occasional listening.  I mean it's not some pop song that I want to
listen to, it's RTTY, radioteletype, for my science project. How can I
get wwwoffle to excuse me just this once without having to go edit the
configuration file again? OK, never mind. Changing DontGet to
!http://www.wunclub.com/*/*.wav
*://*/*.wav
Anyways, need some finer grades of DontGet next time.