Where to buy Tiki Door Knobs

I'm looking for some tiki door knobs. I have two doors that already have levers. Here is where my problem comes in. I'm looking for tiki knobs only for one side of the door (the side thats in the tiki bar room) and want to leave the existing lever on the other side. I would prefer some type of carved tiki but remember it has to twist to open the door so anything tropical will do. Any help would be greatly appreciated.