Found this and flashed it to my tablet haven't had any issues with it yet.
Step 1: download from link (I used my tablet to download it.)
Step 2: rename to update.zip (used esfile explorer to rename and move it)
Step 3: copy file to root of EXTERNAL SD CARD
Step 4: power off tablet
Step 5: press and hold left volume button (button with two dots) and then press and hold power until Acer appears and white text in the upper left corner then release the buttons
Step 6: let it install it shouldn't take all that long
Step 7: Enjoy Ice Cream Sandwich. Suggest rebooting just once to let it settle in
Not responsible for bricking or blowing up your tablet.