I was just thinking (uh oh!)...
If someone here wants to try to reproduce this kind of cooling, one could take a copper HSF, and add barbs and a lid.
From this list , I found the following were of a copper finned design:
(of course the fin spacing is WAY off, but it's not too bad)
Thermalright SK7
Vantec 1U
Global Win CAK II 38 and CAK II 16
Evercool CUD-725
Dynatron DY1206BH-638
Cho-Liang CB0315U-17
CoolerMaster HSC-V62
Dynatron DC1206BM-R
Now, never mind how they perform as air coolers! BTW, some of these have soldered fins, some have skived fins (fins are shaved off of the copper base). The skived models would probably offer better heat transfer from the baseplate.
(I avoided listing those HSF where the middle fins were removed for the mounting bracket).