Found the latch at CW...called a Frig/Converter Vent Latch.
Comes in a set of 2. One long and one short latch.
Mfgd by RVDesigner.com Part #E377
Found on some supply sites as part # 43977
Fit my Parallax 7300 Power Center cover perfectly. Looks OEM
Here's a couple pics.
FYI....Molded in one piece. Just break apart and insert one piece inside the other. Twist to lock. I used the short one for the thin metal cover.