I'm 5'11" with a 35" inseam flat footed so I'm also always looking for long jeans and trousers. I've got a pair of Citizens of Humanity trouser style jeans that work with 3" heels. Someone recommended 7's to me but I can only wear them with flat shoes - definitely don't put them in the dryer! I'm currently on the lookout for the perfect pair of Rock & Republics as they seem to be very long and slim but the inventory at each store I go to is quite limited. If you've got a slim waist, you might try Zara for trousers. I've also got narrow shoulders and suits from Zara fit me like a glove.