Need Help. Brake Booster on 67 barracuda

i live in the uk, with a 67 barracuda RHD, and brake booster is knackard. and have been told that i couldnt get it reconditioned over in the uk as they cant get kits to do them. midland ross unit with a clamp around the middle of the servo, double diaphram it is. can anyone help me out.

it has the front disk brakes, its rhd but dont think it's any different to lhd cuda's. year 1967

cheers