Last summer I built some kickpanels for my 3rd gen Max but I'm not using them right now as I changed the system and I'm using different drivers. These specifically fit Dynaudio MD130 tweeters and MW150 5 3/4" midrange drivers, but should easily fit any large flange 1" tweeter and 5.25" component set.

Pics are located at http://canuck.audioguy.net/kicksetc.html

They are slightly modified from what's seen there as I no longer use that grille/cover setup and built a lip around where the 5" driver fits so that it would be recess mounted and covered by an inset grille.

Asking $100 shipped.