MIDI control of Pro Tools LE Impossible?

Having just learned there is no "MIDI Learn" feature in Pro Tools version 7, and being unable to get any answer for this question on the Avid forums I wonder if there is simply NO way to use an external MIDI controller to control the volume faders in Pro Tools LE 7. Of course, under the midi 'preferences' menu, two models of controllers are listed for immediate compatibility, both of which cost around $1800. So when I asked a Guitar Center rep why these inexpensive controllers (like the Korg nano-kontrol) are being sold when they don't even work with Pro Tools without having to perform a complex mapping procedure to imitate the expensive mackie controllers "personality", a procedure that seems to require the MIDI learn function- the G.C. rep's answer was that spending thousands of dollars is the only way to interface an external controller with pro-tools. This is unacceptable, especially in light of the fact that my Alesis QX49 controller easily controls the Sonik Synth plugin (which has a feature allowing me to change the CC# of each volume knob). It's just hard for me to believe that Pro Tools does not have the ability to midi map each volume fader and I'm hoping someone knows of another way to do this.