The cabinet latches were the original positive door latches that where in the trailer just painted them flat black as they were very faded and the finish was worn out. They cost about $20 each to buy new ones so I found some surplus latches for $3 new and stripped the plastic latch part to rebuild mine. Yes I am a cheap old fart.
The first picture is the latch used by casita
and the second one is a Jayco latch that I used for the plastic parts. When I bought the jayco latch, I only received the latch portion without the parts that it latches into. The darn things will last forever if you could just buy the plastic bits that wearout.