I used a Hydratech Booster, works very well. I only had 8 niches of vacuum and had tried a vacuum pump. Yes the vacuum pump worked, but it was noisy and you could feel the vibration when it came on. Also had relay problems which you would not know until trying to stop with no vacuum.
http://www.hydratechbraking.com
I went for the full show option. Looks and performs very nice. It can be done a lot cheaper but I did not want a used one.