Heatsink for HP Z600

HardwareExtreme

Honorable
Jan 5, 2016
261
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10,865
Hello everyone.
I was wondering what heatsinks will work for the second CPU in a Z600. I ask this because I just bought 2 X5650s and the Intel heatsink that I bought has too wide of a base. This is a Revision 1 (B3) Motherboard. And, I one of the Westmere processors working in it perfectly stable. However, will the second one work if i can find a suitable cooler? The HP coolers are EXTREMELY expensive, like $100 used for a Z600 Cooler. I can only really use Amazon to get parts.
So, any help?

This is the second CPU cooler, so I should have enough height to use any cooler. However, it needs to be fairly small width and depth-wise because the fan shroud for the memory will conflict with it it it is too wide. AFAIK from the screw arrangement it is standard LGA1366.

Specs:
3x4gb DDR3 ECC
1 x X5650 Hex Core
GTX 750Ti OC
1TB WD HDD
Windows 7 Ulti X64

Revision B3 motherboard with '09 Boot block. I have bios updated to 3.60.