I'm interested in what you find as I plan on adding cylinder locks instead (trip to South America requires additionnal security) like this:
So there's no point having the 2 original locks (especially that one was changed by the previous owner so I already need 2 keys).
My guess is you can take the original metal tab and put it on the new latch but, per your comment, the size of the hole might be the issue.
What if you just have a local welder extend the metal tab of the readily available replacement parts? (Ex: Camping World
But I'll let you know if I find something!