I've just listed my Bargman L400 on ebay: Bargman L400 RV entry door latch | eBay
I wish I could offer it here for a low price, but I just hemorrhaged a big wad of cash getting supplies for the winter makeover....so hopefully I can make some of that up selling this thing on to an original-parts enthusiast.
In case you guys are interested, I pulled this off my 1980 Burro
just because I'm doing a big remodel and fix-up and decided to put in newer door locking hardware. It's in decent usable condition now but needs some TLC to ensure a longer life, and I'm not committed enough to the idea of original equipment to want to make that sort of investment in locksmith services.
I'm replacing it with a new Fastec lockset which I can replace easily for $30 if I ever need to. Unfortunately I will have to re-sculpt the door a little - I wish there were a new lock/latch model that fits the L400 footprint, but it seems there's not. Sadface.