I switched mine over to a metal sink mounting bracket kit used for residential kitchen sinks. I found it at Home Depot but it is likely fairly common.
The stove on our 2514g (flip galley) kept falling out using the crappy plastic originals. I also used slightly larger diameter stainless steel screws since the originals were bent. They also came from Home Depot. The right name for the originals is 'junk'.
2016 Roo 21SS, 2016 F150
2015 Rockwood 2514G (pup), 2015 Fd Expl,
2003 Coleman Utah (pup), 2007 Fd Expl