I live in the Fort Lauderdale, FL. area. I got mine at a Marine store, I don't remember what the capacity or size of them were, but together they were over the 7,000 lbs. that I neeeded...
Here is a link for links
Erigging - Catalog
Or you could do SS Anchor shackles....
http://www.e-rigging.com/store_produ...Choice=Catalog
Seems a little pricey, I know I paid less........