Or "fount" from older, non-American English.

Fount is definitely more correct. If we're talking a baptismal font, then it's font, but if were talking a fount of knowledge, the correct term is fount with font sometimes being used but derived from fount.

Etymology 1, meaning 3: https://en.wiktionary.org/wiki/fount

Etymology 3: https://en.wiktionary.org/wiki/font

Thank you, I couldn’t remember which but I figured I’d hit Muphry’s Law either way.