If it's the rears that need to be replaced, it might actually be cheaper to just get new control arms with the bushings in them from eBay and then you can replace them yourself.
Rear Lower Control Arms for Civic but then if you snap the bolts you'll need to extract them and get new bolts. Even if that happened it'll still be cheaper than having a shop do it for you and would be good experience working on your car. If you live in a rust/salt free area then the swap would be a snap! You can also just search eBay Motors for 92 Civic Rear Lower Control Arm (the 92-95 civics used the same lower control arms).
The bushing replacement isn't for the feint of heart, especially if you live in a place where road salt is used. This will cause the bolts to snap on the lower shock and sometimes in the lower bolt that goes to the bottom of the rear spindle.
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