Hand lettered signs are hardly ever in a "font." Fonts are a thing used by mechanical devices such as a printer.
what?? I'm not sure exactly what your'e getting at, but if you're saying that fonts can't look "hand-written" then you are wrong.
There's literally dozens and dozens of them out there that have a very organic, hand written look to them.
And sorry, your 2nd sentence makes no sense at all. Fonts are fonts. Their relationship to a printer is irrelevant to their appearance. (other than, of course, the dpi)
Check out
www.1001freefonts.com...tons of unusual fonts there.