You're welcome.
Here's one more "shot in the dark". Try this link, there are a couple of Global slam locks on page 4. One of them might be what you're looking for.
Trekwood is the 'unofficial/ official" salvage parts for Keystone dealer. If there's something that you can't find for most any Keystone, they are the place that probably has it.
I'd check for the lock on this site, then using the part numbers, etc, do a Google search to see if it's available somewhere else for a bit less money....
Here's the site, again, try page 4.
http://www.trekwood.com/categories/3...ocks-Latches/1
I'm still not sure if this is the kind of lock you're seeking, but I just found this one:
http://www.rvlocksandmore.com/Global...6#.Uz2RCDbD-pp
On the Trekwood site it sells for $42 and on this site it's $9. Like I said, get the information from the Trekwood site, then see if it's cheaper somewhere else...... Hope this helps some....