Here is a picture of the Viper kit that I used to sell. The rotors were off a Mercedes S class, the calipers were from a Viper and the brackets were made from aluminum. They were basically just some aluminum bar stock with some holes drilled and tapped in them. This was all designed in MasterCAM 2D and made by local machine shops. The brackets didn't cost me much to have made, maybe $40 each.
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