I have remus exhausts on board but I am also speaking (trying) to sort a deal with a German exhaust maker that does do manifolds (and cat pipes etc)
Regards Brembo, I have a deal in place but so far my main suppliers will be trw and ate (trw is part of ZF who also own sachs/boge and also offer a bigger range than brembo, also ate seem to offer a more or less identical range to brembo! even down to grooved discs, except ate offer carbon pads!)