The main solution I've heard is to just encapsulate the whole thing in foodsafe epoxy. Then it doesn't matter as much what the inner material in so long as you monitor for damage.
Yeah there are a couple that claim to be like this [0] one, and there are FDA standards to follow for that claim. I wouldn't use one on a cutting board or anything that gets scraped or cut on and you need to let it cure waaaay longer than normal but yeah there are options out there.
