Ok, I understand. I am just at my wits end. Epoxy doesn't hold very well in this location. Both of the holes on the dash brackets are broken, but I still have the piece that they were attached to on the dash. I will take it apart and see what I can do. You have at least given me a starting point.
I suppose you glued the new plastic to the dash. How did you keep it there long enough to dry? Was it just regular SG, like Gorilla glue?
Yes, I glued the new plastic to the dash using Super Glue Gel by the Super Glue brand. Any place I glued the ABS, both on the bezel side and the dash side, I first sanded down using medium-fine sandpaper on both surfaces. That is, I sanded down the ABS side and the dash/bezel side. I then wiped down with rubbing alcohol to get any dust off and get the surface as clean as possible. I did this because it makes the plastics bond together better.
For the dash side brackets, I just held them in place by hand as tightly as I could until they set up. On the bezel side I used clamps as shown in the pictures. Recently, I used JB Weld PlasticWeld to fix broken clips on the knee bolster panel and it worked really well so it might be worth trying that if you have trouble with the super glue.