Easy and cheap engine swap

Looking to keep a 1995 civic on the road,
a crankshaft bolt broke and a few things
went haywire. The body has relatively low
k's on it for its age and is in good nick,
small amount of surface rust, plus usual
scratches and bumps. But like I said good
for it's age.  
Just trying to gauge whether it'd be easier
and more cost effective to swap out the
whole engine, of to open it up and get into
replacing all the crap that went bung.
1.5l Dx civic. Also depending on what
engines are available, maybe something a
little quicker :p. Are there other engine
sizes compatible without having to change
the tranny, mounts, etc

At this point, want to get an Idea if it's
worth even bothering or just flicking it off
as is.

Thanks