1986 Isuzu Trooper/ looking for parts and catalogue with part numbers

I am the owner of an Isuzu Trooper 03/1986 2,3l gas. It is branded GM (general motor) DLX VIN starts with JACUBS162.
Can I reliabily buy parts for this car from the US.
Can't find anymore parts in France for this car.
Will buy a catalogue with part numbers to identify easily the replacement parts from manufacturers other than original brand.
Thanks Jl
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