Discolored Healing Potion for hoarde if I remember properly is obtained by doing a quest in Silverpine Forest.
Elixir of Minor Agility is a pretty hard one to find. Its a pretty rare drop
http://wow.allakhazam.com/item.html?witem=2553
Rage potion recipie is sold by vendors there is probably a limited number, but I bought it no problem.
http://wow.allakhazam.com/item.html?witem=5640
Swiftness potion is also a pretty hard one to find. Its a pretty rare drop
http://wow.allakhazam.com/db/item.html?witem=2555
This site does have all the info ur looking for.