Is there a service or a individual out there who can as accurately as possible translate a short proverb into ancient Egyptian hieroglyphics?
You could try one of the translation subs, e.g. /r/translator, /r/translation. Or post your phrase here; it's possible that someone might be able to help you.
So, things you should know. In both forms of Ancient Egyptian (and not a strange substitution code we teach kids at a museum for phoneme substitution) there was no tense. Which is why translations seem bad in English. It is always direct simple present statements of fact. Without any real conjugations, mood, or any complex structure you're used to, you probably can't translate any proverb meaningfully into the language(s). It is completely different from any modern language.