I think 2112 has imitators on his bike. Maybe drop him a PM? I get diving under braking too, even with the preload wound right up, but then I'm a another 25kg heavier than you! I'm going the fork spring route, but it isn't a major priority to me as I only use my rear brake at speeds less than 10 mph, so cuts down on the low speed diving approaching junctions etc.
*Edit* they are called "cartridge emulators" not imitators!