Generally they are not available due to agreements between the guitar manufacturer and the guitar builder. However, if you do some digging, you can find the production models they are based on, and get those.
I took mine out. I much prefer my Gravity Storm and Injector. I still have the Hyperion middle but just to save money - I really never use the middle pickup on this guitar.
My guess is that it does. That would be common with many OEM-specific models. But I hear the Pegasus is close. There are also people that take them out of their guitar and sell them, so be patient and you might find them out there.