Some of the items you linked do have alternate ways of getting the skin, from boss drops, questing or random drop BoEs.
But yes, I would love a way to obtain these recipes again.
Please bring them back. :)
Oh, and not to nitpick or anything, but you have General's Leather Boots under 'Weaponsmithing', Bloodsoul Shoulders is linked twice in a row and the Ornate Mithril set is listed twice, under 'Armorsmithing' and 'Misc'. >.>
Woops! Probably put the wrong code in for that one, and I was merging lists so I'll edit that out when I have time. Thanks!
edit: should be better, doing this on the fly! It's too much work for me to find what skins have been used etc etc, but I just want the armor/weapon smith TBC patterns back personally.