Scooterman, If you need a 100-150 yard carbine, you could be very happy indeed with ANY of: 22 Hornet, 218 Bee, 221 Fireball, 222 Rem or even oddities like the 219 Zipper. I happen to have all of those, but the only carbine is the Fireball.
I'm about to sell the 219 Zipper, but it isn't a carbine. It's a 14".
The Hornet barrel re-chambered is actually a bad idea. The twist rate is only 1-16" in the Hornet, and that wouldn't work well at all for the 222 unless you were willing to stick to 40-45 grain bullets.
For lots of Contender stuff, see my friend Mike Dykstra's website. Check soon (like TODAY), because he'll be at the Big Reno Show this weekend, and he always sells lots of barrels there.
M&M Trading Post
Edit to add: Mike has MUCH more than the few barrels shown on that site. CALL him.