Cabela's has a nice Warn Receiver Shackle and 3"x30' tow strap you can buy.
I still haven't had the pleasure of using them but cant wait!
http://www.cabelas.com
both are in "Automotive / atv" , Automotive Exterior, winches/recovery accessories
(a direct link wont work or else I would post it)
This is a heavy duty shackle and Tow strap (real nice)
You may be able to find a few others out there but these are pretty darn good.
Best Regards!
-Big J