FuBar TrainerFu does the trick. You can use it with FuBar or with a FuBar-to-Broker LDB Display PlugIn. It shows (with options to adjust all settings) your Abilities / Spells / Tradeskills, etc... up to as many levels as you wish, the cost and even where to train. You must first visit a trainer for each of the Tradeskills you have, and your own Trainer, and it'll then remember it from then on. It's outstanding. I use it with Fortress & FuBar2Broker.
http://www.wowinterface.com/download...TrainerFu.html