How did this work out for you? Is there significant glare?
Was cleaning the other day and came across a screen protector I bought for an old tablet some 7 years ago (asus t100tam). It's a 10.1" 16:9 format so more square than rectangular than the 10.25" in the car. I had to trim about 3" off the bottom to make it fit. Notice the reflection in the garage from the passenger
seat to some extent. Haven't driven the car yet with it.
Hopefully it works out. Using a bright light I already see a few very thin scratches on the display. Don't use finger nails or wear rings when touching it. I too would prefer a matte protector, but already have this one on hand. It's a dry static cling type so no worries of residue if I have to remove it.