Well… sometimes people just don’t understand each other, too. It was nice talking to you. I didn’t ask any questions because you made yourself quite clear in other comments. You seem to be the type that makes timid people feel unseen, and I don’t vibe with that.
By trying to make sense of everything, I don’t mean the small fishbowl you seem to be seeing here. I mean humanity. Maybe I’m just insane.
Well, good luck to you. Pick out and reply to everything you don’t like in life (as you did here) and trample past everything else. That just sounds like stress to me, and I have enough of that without seeing daggers where there are none.
Though non-toxic, it seems liquid silicone can block the bood pathways in your body if it gets in your system. Also, industrial grade (and cheaper) silicone can contain toxic additives, which has been causing a stir lately.
However, accidentally ingesting a tiny amount of non-liquid food grade silicone particulates shouldn’t raise any concerns, but I see why op might still be wary about it in a spigot.
To op: Have you considered getting a spigot with silicone o-rings and buying third party natural rubber o-rings to replace them with?
Edit: Ah, just reread that you did for the gaskets. Hm. Lemme see if I can find anything.
Edit 2: I found a site selling natural rubber gasket material. You may have to cut it to size:
https://www.mcmaster.com/products/gaskets/water-resistant-high-pressure-natural-rubber-gasket-material/
Edit 3: Natural rubber spigot o-rings doesn’t seem to yield many results, but I got some hits for natural rubber faucet o-rings. Maybe try there? Hope you find what you’re looking for.