As far as actual grips, I don't think you'll top the Franiac without doing some sort of home-brew job that's likely to be a whole lot uglier...
There are some leather skins available on ebay and probably elsewhere, however, that look pretty nice on the camera and will no doubt vastly improve the grip. Even if there's no change to the "topography", the change in texture might be all it would take. If you're looking for a solution that's actually attractive, that might be your best bet...
-Ray