Have you looked at surplus places like princess auto?  or maybe a computer junk dealer?  I saw heatsinks and such on sale at princess auto awhile ago... and you could probably pull off old computer heatsinks from old/dead computers.  If you were closer, I'd give you a couple of cpu heatsinks I have sitting around. 
 
-Rich 
		
	
		
		
		
		
		
	
		
		
	
	
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