Implements are funny things. If you're into spanking at all, it is a widely discussed and varied topic.
When I first started reading spanking blogs, I was always amazed at the things people would come up with.
This is a top of my head list of everything I can think of. Let me know if there is something I missed.
Sushi Paddle (like a wooden spoon, but shorter and wider)
Ping Pong Paddle
What else can you think of, and where do you like to shop for implements?