Like nearly anything, it can be done if you are willing to put enough into it (actually, I don't think all that much would be required to do it here) but the question is it worth it . . .
Keep in mind that the vast majority of your braking effort is extended by the front brakes, and even on stock systems, the pressure to the rear brakes has to be reduced through a proportioning valve to keep the rear brakes from locking long before the fronts.
Some people would want to do it on looks alone, which is fine if that is what floats your boat, but even if you're only doing it for looks, you still have to do it right, because after all it is your brakes, and the safety of your car is drastically affected.
If you are going to do it, keep a few things in mind.
1. You will likely need custom caliper brackets, to go from the rear knuckle to the existing caliper bracket (assuming you are using the stock front caliper)
2. Parking brake. The front stock caliper has no provision for a mechanical parking brake. This doesn't sound like a big deal, but can be a big hassle to get to work properly, AND if you don't have it, you have NO backup method of braking in event of a hydraulic failure.
3. Brake Balance. You will need to get a new adjustable proportioning valve to re-balance the brake system to a safe setup (ie NOT heavily rear-biased) otherwise the vehicle can be quite dangerous under a dynamic braking situation.
Plus I'm sure there are more items, but these are the ones that stick in my head off the bat.