I have used the Gorilla and the Pine Ridge Archery one. I prefer the Pine Ridge Archery Pro-Bow-Cam. Here is a link:
http://www.shopatron.com/product/product_id=DUB2547/101.1

Cabelas has it a little cheaper:
http://cabelas.com/cabelas/en/templates/links/link.jsp?id=0021126416015a&type=product&cm Cat=search&returnPage=search-results1.jsp&QueryText=pine+ridge+camera&N =4887&Ntk=Products&Ntx=mode+matchall&N ty=1&Ntt=pine+ridge+camera&noImage=0