I have a solution for you, but the Roadmaster # RM-1139-163 is not the correct fit for your 2009 Fleetwood Tioga. Instead, you'll need the # RM-1139-147.
I've linked an installation video of this for you to check out, as well. view full answer...
The closest I was able to find for your 2004 Fleetwood Tioga 29V is the Bauer Products Rotary Latch for Horse and Utility Trailers # BA85FR, which measures 7-3/8" long, 1-7/8" wide, and 7-3/4" tall.
This latch is a bit taller than your original latch dimensions, but if you're willing to make some minor alterations you could make it work.
This will work great with doors that are 1-1/2" thick, and will fit into cutout openings measuring 6" tall and 4" wide. view full answer...