Not quite the same, but here is a similar snap clip.
http://www.sailrite.com/Fast-Eye-Snap-Hook-Stainless-Steel-1
and another here.
http://www.jamestowndistributors.com/userportal/show_product.do?pid=11277&familyName=Seafarer+Snap+Hooks
Of various queries, "web snap hook" seemed to yield the best results.
http://www.sailrite.com/Fast-Eye-Snap-Hook-Stainless-Steel-1
and another here.
http://www.jamestowndistributors.com/userportal/show_product.do?pid=11277&familyName=Seafarer+Snap+Hooks
Of various queries, "web snap hook" seemed to yield the best results.