If she doesn't like vibrations near her clit, then a rabbit is a distinctly bad idea... I think you guys are on the right track with regular vibrators that you can use to tease around the area and use inside her. From my experience (having both a clitoris and a rabbit vibe, that is), it's very hard to use a rabbit vibe for penetration without in some way hitting the clitoris - and I know full well how uncomfortable vibes are on an over-sensitive clit! I'm shuddering just thinking about it.
Richard's idea is a great one for minimising the vibes, but it seems to me that if she doesn't like vibes on her clit, then a rabbit's just not for her.
Another idea, if you're really keen on trying out a rabbit, is to turn it around so that the ears tickle her near her ass and not her clit... I find this really yummy and it can be a great precursor to anal. That way she gets the yumminess of the rotating beads inside with none of the over-sensitive clit action!