Other Civic sedans is the obvious answers. You can check your local junk yards for good passenger seats and re-upholster your torn driver seat. Can easily find good passenger seats.
DA Integra seats will fit for 90-91 but only three of the four bolt holes will line up. The inner front one does not, about an inch or two off. Integra and Civic seats won't pan swap either.
If you just want stock seats, I'd go with finding some more sedan seats locally in the junk yard, take the fabric off in the yard and just buy that. Should be able to do both seats for $10 and a days work.