'88s have some weird parts that are different from the '89-'91s. Just a fore warning. It does look like the brakes are the same (given the same trim at least; HF and Si are different, for example).
If you were to get the calipers from a place like Autozone they're $35/$38. I know CRXes are rare finds in salvage yards.
You can easily cross reference part numbers on a site like autozone.com btw. That's why I mentioned that store.
CRX HF
C8114/5
$39
CRX Si/Civic 1.5/Civic 1.6/Civic wagon 2WD
C8702/3
$35
Civic wagon 4WD
C8110/1
$34
This is just for 1988 years btw.