Problem with details on my pumpkin carving & design; assistance, please...?

Once again, I have been tasked with submitting an entry in my workplace pumpkin carving & design contest (...been doin' it for eight years, now, and I have always managed to win at least one, if not two of the offered prizes, for my entry). This year, I am attempting to do my pumpkin rendition of 'Audrey II', from the musical movie version of "Little Shop of Horrors". I have pretty much all the details and materials covered...except for one thing, that's gettin' my head a-scratchin. How the heck do I construct those huge lips on the plant?? If you recall, those lips just stuck out there, as the plant was talking and singing, so carving them out of the pumpkin flesh might not be possible. Anyone have any suggestions??? Ideas most appreciated......