But a good place to look for information on hobbles is your basic feed/livestock supply site. Both breeding (isn't that a delicious name?) and cribbing hobbles are commonly available at such places. Many also have grazing and pawing hobbles, which can be loads of fun.
Check these sites:
http://www.applesaddlery.com/cat_pdf/92_76.pdf
http://www.countrysupply.com/subdept...19&maindept=18
http://www.nationalbridle.com/prodDe...atalog_ID=0044
http://www.chicksaddlery.com/Merchan...duct_Code=3277
Honestly, it's been my experience that the hobbles available on BDSM sites are rarely of as good quality, and are most certainly more expensive in most instances.
Have fun
Kallie