To the best of my knowledge there are only 2 pad variants currently available. However Final does occasionally make limited addition products and accessories in regards to specific requests from certain areas such as Europe and Japan. I will follow up with you once I have more details from the Final Engineers.
This is a perfect example of why we have opened our sponsor page with head-fi. We are great at designing and engineering, but not to great when it comes to communication. The strange part is that we absolutely value our users opinions and have been trying to find a format for some time. Until now we had relied on individual dealers to provide us with information, but this has not proven to be successful.
The President of Final, Mitsuru Hosoo, has initiated this program venue with one goal. To interact directly with our community in order to be completely transparent. His goal was to receive information on Final products so that we may better serve our customers and affect changes as needed in our products.