There should be a manufacturer tag on the toilet somewhere. Often the brand is right there on the front. Just look better.It’s a 2003 I don’t see any numbers on it though
18 bucks on an RV parts site. https://getrvparts.com/sealand-dometic-385310067-rv-toilet-rv-marine-sanipottie-latch-kit-parchment/I can’t believe this guy sold 48 of them for $66.89. That’s what happens when people don’t know how to Google. At least they got free shipping, lol.
Sealand Dometic | 385310067 | RV Toilet RV Marine Sanipottie Latch Kit Parchment | eBay
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