I've heard of people getting hammers and "encouraging" the cage to fit the new unit, but it kind of fracks up future install plans, wouldn't suggest doing it that way unless you are desperate.
didnt come with a cage, if you read his post.
my deck just sits friction fit in there
doesn't matter to me as it's not a bloody Autosalon rice box
"friction fit" might not stay "friction fit" in an accident, and you might end up with a headunit lodged in your skull.
its really not hard to do it right, your car doesnt have to be a "autosalon rice box" to have a securely mounted stereo.
DANNY8, take the instrument panel fascia off(the bit that wraps around cluster and headunit), screw some flat strap into the sides of the headunit, and bend right angles ~1-2cm(you'll have to do some measuring to get it spot on) from the front of the headunit. you may have to unscrew the 4 screws holding the plastic surround to the steel behind it, and bend it out a bit for the screws on the headunit to clear.
screw the straps into the plastic and metal. reinstall fascia, clip on the plastic surround that came with the unit, and voila, you have a non projectile headunit installed.
its easier for me to do it rather than explain it but i hope that helps.