If you stole the magic lockpicks and they broke when you tried lockpicking, then installing the
patch will place them back in commander Kratus' desk to be re-stolen. If they disappeared after being dropped on the ground, the patch will not help. Before 1.34 they can not be returned and bought back. In games started after installing the 1.34 patch, the lockicks can be returned to complete the quest then bought back, and can be safely dropped on the ground.
to replace them;
Lost Items - guide and directory of inventory files (see one of the replies for a description)
The 1.34 patch is official and contains all the previous updates.
Anything I've posted is a hack or manipulation of game data to work around bugs or player error, or just for the sake of hacking.