Someone mentioned it could be a Seeley front brake.......not sure, certainly not as good as the 230 mm 4 l/s he is using on the Egli's. Patrick told me they are a copy of a Fontana that he makes himself, I was almost too scared to ask what they would cost to buy. He did tell me, but as David said, he makes little in the way of spares..........They were too much for me......!!!