I need help with my Subaru Justy Gl12 Model 199

Hello mechanical friends.
I need a little help, I am from Guatemala City and it is very difficult to get spare parts for my vehicle. And I need to know if it is possible to adapt or place spare parts of another brand or some equivalences. Please if possible your help with the brands and models of the spare parts that are equivalent to those of the Subaru Justy Gl 12 Model 1988, with motor number 449204 EF12.
I hope you help me
in advance. Thank you.