Many companies make heatsinks for this type of socket. Look into heatsinks produced by Coolermaster, Thermaltake, Scythe, and OCZ. Many online stores, such as NCIX, provide many different types of heatsinks you can look into. Use a search engine to find online computer parts stores, or go to your local store, to find heatsinks.
Before looking into a heatsink, consider its fan size, speed, settings, quality, and features it may come with.
Just by searching, I came across a few models which may or may not interest you:
http://www.directcanada.com/products/?sku=14110AC9834&vpn=SCBSK-1000&manufacture=SCYTHE
http://www.directcanada.com/products/?sku=14110AC6764&vpn=RCCF-1201SP&manufacture=SCYTHE
http://www.directcanada.com/products/?sku=14110AC8403&vpn=SCANG-1100&manufacture=SCYTHE
http://www.directcanada.com/products/?sku=13220AC5185&vpn=OCZTVEND&manufacture=OCZ
http://www.directcanada.com/products/?sku=11130AC8602&vpn=RR-910-HTX3-GP&manufacture=COOLERMASTER
http://www.directcanada.com/products/?sku=11130AC8843&vpn=RR-B10-212P-GP&manufacture=COOLERMASTER
Good luck in your search.