Check eBay there are a few companies selling them for 100 bucks or so.

One of the problems with reflectors is they also reflect heat! Mylar will reflect plenty of light with out heat. It's not just for growing trees dude...did you know you get more lumens from the same bulb is you hand then vertical instead of horizontal? Cool tubs let you get the most out of each bulb. The cooler temperature allows the light to be closer thus providing more lumens and light penetration then just hanging a hood over the canopy ever will and thatâ??s a FACT!