These are the parts I used for my 100W Flashlight.
I know, mine is not looking like the one in the Video, but it's smaller, lighter and easyer to build (if you got an 3D printer ;) ).
I don't know what heat sink I used (I found it in my cellar).
It could be an arctic heat sink 80x80x35.
I think a XILENCE l110 will work, too. But no guarantee!
Parts I used:
"Boost Plate" comes between aluminum heat sink and circuit board. You may have to resize it a bit, depends on the Boost you use.
"Cooler Holder" is used as a handle.
"Cooler Holder Poti" used as a handle with potentiometer.
"Cooler Stand" used as a foot (maybe print twice).
"Cooler Stand Text" is a foot with text on it (not nice to print ): ).
"Spacer" is a spacer between foot one and two.
I never would have guessed. :D
"StepUp Cover" protects the Step-Up Boost.
"StepUp Cover 2" protects the Step-Up Boost (Fan fits better).
"Poti Knob" is a customized version of http://www.thingiverse.com/thing:54024
I wanted to use "LEDFocus" as an adapter for an old projector-lens but.... Nah... Bad Idea. Too hot :o