Look for Atrium Lighting on Ebay and reach out to him....same diodes, same high quality boards and heatsinks (..You fasten the boards with enclosed hardware, wire them in series or parallel (I use parallel for multiple boards); buy and attach a driver and..Boom..white light! I run a few of his (288's) as do a few of my students..good guy, great product ! I suggest a Meanwell driver with dimmer leads (B type instead of A type)..Attach a $5 100k ohm pot..and you have a dimmable fixture!(listed on his site). If you need help..I am here as are others that have used similar boards.
Also google
HLG Quantum boards videos and there is help for assembly visually (maybe a 20 minute job..most of which is attaching the screws from board to heatsink)
I just looked and he has his own site now.
This high efficiency LED Board uses 288x Samsung LM301B SK Bin diodes for full-spectrum lighting; critical for the vegetative and flowering stages in your indoor grow. Accepts up to 120W of power at a compact 9"x9". Uses Meanwell drivers, and can be daisy chained for a clean setup.
atreumlighting.com