Need some help with some wierd problems

[Novacaine]

I am working on a 58 Jaguar and need to go through the brakes on it. The guy that owns the car wants to put 4 wheel disc brakes on it. My question is do any of you know of any aftermarket kits that would fit or who would be the best company to call. The problem I have is the master cylinder is vertical and not horizontal and the brake booster is on the other side of the motor compartment.
Thanks for the help guys, Novacaine