A while back, a bunch of us opted for the JCW/Sears trunk because it was fairly inexpensive. It has worked fairly well for me, but has had a few issues. The lid retaining straps broke, so I replaced them with leather shoelaces, with good results.
The locking mechanism had started being a bit sloppy, but I didn't really think much about it. Until it fell off entirely. It appears that it is only held on by one small machine screw from inside the trunk. Moral of the story, if your trunk latch starts getting loose, fix it before it falls off.
I haven't contacted JCW to see if they sell the latch separately. If anyone has a spare latch from a damaged trunk, please PM me.
Cheers.