you can fit the A20A3 engine as it is the same engine which came inthe accord from 86-89.
alternatively you can fit the following which came in the accord from 1990 onwards:
F20A
F22A1
F22A4
F22A6
Also the ZC series 1.6L engine (JDM) will fit you car with little alteration, it was found in the CRX, Integra and civic Si.