I know this thread is pretty dead, but if anybody finds it looking for an INA SLH 12501 like I did, 1800 409 3632 is the number to call, per previous posts in this thread. $17 for the bearing as of 3/5/15, the ONLY other one I could find online was $78 on ebay from France.
Also, though this is the ZJ forum, I can also confirm that the same bearing is used on the '98 Durango Non-plow Saginaw setup which is what I'm tapping/rebuilding.
Thanks to those who originally posted this info!!!!