Any reason why u don't want to use an inertia dyno and must stick to brake dyno? Well, if in KL, most of the dynos here are load/brake type. I suppose all dyno operators should know how to run their own dyno. Whether it's 100% calibrated or not, perhaps only God knows :) I've dynoed in DMT Racing & N1 (both in Sunway, KL).
In JB, Vaz-Maz also have a dyno. Not sure what kind of dyno as I live in KL.