Hello. I need two types of heatsinks.

1st heatsink :
A heatsink which will cover at least a 40 mm x 40 mm chip and support a square 92 mm fan. Probably this type :
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ID:	21569Click image for larger version. 

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2nd heatsink :
A small round pin passive aluminum heatsink with 42 mm(w) x 42 mm(L) x 20 mm(H) in dimension. Probably this type :
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Can anyone tell me where can i get these types of heatsinks in dhaka?

Thanks in Advance.