Is there such thing as aftermarket motors for classic 92-92 civic?

What I mean is are there people still creating new motors that are not directly from honda for the classic civics?

No, not like classic fords or chevy motor that are available brand new. There's no need since Honda are easy to rebuild, and there are still a lot of them around. You can find rebuilt motors for Honda, not new ones.

"Classic" and any model from Honda are mutually exclusive. There's nothing inherently classic about anything made by Honda. They're a dime a dozen, as plentiful as pimples. Do you mean "old" instead?