I was going to suggest punching it with a screw driver, then I read that you wanted to keep it.
Pour stabil in it and call it good. To remove the lock cyl, yes, you remove the column clam shell as stated above, insert the key and rotate it backwards as stated, then using a screw driver, you push up on a catch that is on the bottom of the casing - should be rectangular, and fairly close to the outside end of the cylinder. With a screwdriver pushing up on the clip, the cylinder will slide right out as you pull the key.
Why do you think your lock cylinder is what has failed?