Dear Zia,
I would not know about the 89 lancer but I can certainly tell you that model 92 - 95 uses a 1.3 motor adopted 100% from Hyundai Excel (I am sure it will fit the same mountings on your 89. If you are looking for a cost effective engine, go for a Corolla, if you want to restore originality, just buy a Hyundai engine and place an air cleaner with Mitsubishi logo on it