The cast housing that holds the ignition cylinder in place is not sold separately. You would need to fully disassemble a steering column to get one. You may be able to buy one from www.steeringcolumnservices.com/
In order to do this job, you will need to remove the airbag, steering wheel, steering shaft, turn signal switch, wiper switch and clockspring. This housing is located below all of those and is fastened to the column tube by two #25 tamperproof torx screws. The only way Jeep sells this part is by selling an entire column assembly.
Myself, I would buy a good used steering column, and have the ignition cylinder re-keyed to match your existing keys.
Progressive Liberalism: Bringing you new ideas so wonderful, they have to include mandatory participation ......
Originally Posted by Ronald W. Reagan: Government is not the solution to our problem; Government is the problem.