Power supplies are cheap here
http://www.mpja.com/prodinfo.asp?number=16854+PS
The dimable buckpucks w/pot would be $20 each here (10/12 needed for 60/72 LEDs based on the power supply above) I would get a different driver if I had a profilux, but they're expensive
http://ledsupply.com/03023-d-e-1000p.php
For LED's, I heard you can call
http://www.etgtech.com/ and they will sell you the royal blue for about $6 each, not sure if they carry the XP-G which is $7-8 roughly online
A cheaper option for whites would be
dealextreme, if you dont mind slow shipping and XR-E Q5 instead of XP-G (XP-G about 30% brighter, also about 50% more $)
I might want for another groupbuy on nano reef, they had better pricing on the LED's
You can get the heatsinks from
http://heatsinkusa.com/
Cali, if you know cheaper sources then above, LMK
:Hydrogen: