Just to give you an idea of what others have done with their civic hatch backs.
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Ken's 1991 Honda Civic
Mike Chancey's 1988 Honda Civic
Bill Crozier's 1987 Honda Civic
And what you get with lithium batteries...
Paul Pancella's 1992 Honda Civic
Those civics are all using new motors, used electric forklift motors also work and you might check around to see if there is an electric auto club in your area, people in those clubs tend to collect parts, they also get burned out from projects and sell new parts cheap.
Oddly enough, the civic hatch back is not a common car to convert, I think the main reason is that it's a bit heavier then a geo metro and the civic doesn't tend to have the engine wear out, unless as you found, it was owned by a teenager, but even at that look at what you can get from
Car-Part.com--Used Auto Parts Market for a civic engine and you might find it's cheaper to buy a good used one then to rebuild, because of that a lot of civics tend to rust out before they stop running, but a solid body with a dead engine is also the perfect car to convert to electric.