lost all keys need key code for 89 cherokee

The dealer key code search only goes back to 1993, we lost our last set the car is locked up and we can't get in.

On one that early a slim jim is it.
You may call a locksmith.

just pull the locks and redo new keys and tumblers (or whatever the plates the key moves to get it to open (worked at gm and did a few locks) its fairly simple