u get that chunna anywhere...
also available in normal electrical and electronics shops
most people fail to understand the actual purpose of HS compound
the only main purpose is
contact..
(just try the temp w/o a compound
mine was
dow corming - 31-33
chunna(its actually a white ceramic grease) - 32-34
nothing - 52-55
other factors like
heat conduction(which only results in 2-3 deg diff) comes later...
(here is where high perf compound like artic silver comes in picture)
Thermal transfer compound comparison
just check the graph at the end of the article
imho the chunna is the best HS paste afaik price to perf is concerned...
just 2-3 degrees difference