Yea, I remember seeing that in the service manual that the gauge assembly is one piece. IIRC, AAM had to get into the dash to remove the gauges. I may be wrong on this one if one can get access to the screws from inside the navi area.
So get into the navi area to pop the 3rd latch of each gauge face? Hopefully that's enough to pop off the needles and gauge faces. I'm going to have Black Cat Custom work on the gauge faces.
This is definitely a summer project... let me know how yours go, and perhaps you can make a DIY on your own! I'll do the DIY LED gauge face swap
