Currently Being ModeratedJan 16, 2013 10:54 PM (in response to JohnnyC76)
I have one that I use on occasion that is called SMK-LINK and it connects through Bluetooth. My model # is VP6272 but I bought it a year or so ago from the Apple Store. Decent and functions as calculator when not needed as a 10 key.
There are also programs for the iPhone if you own one that will let you turn it into a 10 key.