Are there any methods in official WotC sources of disabling specific limb or limbs on a living and/or non-living creature? Use Rope has obvious applications in conjunction with a grapple and pin, and has already been considered; I need to know about any other options, so please do not answer "Use Rope check".
Any other WotC officially approved options are what I'm looking for - a rules-as-written finding about specific limb disabling. For those not familiar with what is officially designated as first party content for 3.x, WotC has designated their own books, their website articles, the D&D cartoon DVD booklet, Dungeon magazine, Dragon magazine, and specific websites (Athas.org, Planewalker.com, Birthright.net, Spelljammer.org and the rest of the official sites - the content is co-owned and therefore first party) as the official first party content for the 3rd editions of D&D.
As all 3rd edition is also d20 system, any WotC produced or officially approved d20 sources are also valid sources for the answer.
It is possible that no such official rule exists, if so, then that will be the accepted answer.