HTGSupply has 150w HPS lights with ballast and reflector for $69.75 and 250w HPS for $117.95. Pretty reasonable pricing for lights that will vastly improve your situation.
I, too, would love to get your sources for the actual bulbs. I've found Red and Blue 3w diodes (at 660nm and 455nm respectively) for $10.99 for 10 on ebay. I know LEDs can be expensive, just wondering if yours were any cheaper.