I'd go with the Alto front and rear "power-packs". I'm using both in my new tranny(it's not together all the way yet, but it will be VERY soon). The kits can be had for a lot less than what FM or Hahn wants for it.
BTW, I was told by a guy at Alto the are going to be making a new, wider front band for the A413 shortly. It is in testing stages now....