Blueunplugged appears to have the Wii Play remote bundle in stock for a decent £32.90 delivered. Using the "BMC10" 10% discount code at checkout brings this down to a very nice £29.90 - cheaper than the remote itself!
"No matter what your gaming experience Nintendo has just the game for you to play with your friends and family. Wii Play consists of a selection of nine very different mini-games on one game, which are designed to help you master the unique Wii Remote, whilst also providing hours of entertainment. To ensure you can enjoy Wii Play with your friends, the game comes bundled with a free Wii Remote."