I thought there were only 10 but you might be right. I know I've got 4 of them. And I live the one I'm running on my bike.
I'm trying to remember exactly what Matt told me. Seems like the initial run was 10 but i faintly remembering him saying he made a few extras for some reason. But for the life on me, i can't remember why... Either way, these are super rare pipes.
I remember talking with him about buying them and he wouldnt sell them because he was waiting on Q to pay. Had me call him back like 2 weeks later. I called and Matt said that Q had called like the day before saying he was coming by to pay. He had me call him back the next week. So i did, lucky for me, Q never showed so he started selling them.