Lol, I dunno. I was looking at those prices thinking, man I really need to have my lift bag handy in case I find some anchors.
Well, sure - I found 2 last year -
In fact, Deepstops from time to time conducts seminars on the use of lift bags, and lift bag technology (sorry, inside joke, but he is really good at using the lift bag, which should be a part of almost every divers eq - really handy piece of gear and you can send the anchor up via lift vs taking it up yourself after the dive).
I've seen the one's with the flexible tines; never used them, although I can see the advantages.
Check West Marine for grapnels - I went on line and all they showed was the folding type (not the kind you want) but I know for a fact they had them at their Coral Gables location. So if you have a store near you, look and see if they have one.
Another source showing them on their web site is El Capitan - they can send it by mail so you don't have to make the trip to Miami:
www.elcapitan.com/about.html - Cached - Similar
PS The cost was under $80 so you don't need to spend a ton of money on these things - nor do you need a real heavy one - just needs to get down to the wreck in current - depending, I'd say 8lbs - 15 lbs at the top.