The old Oldmobiles & Buicks etc?

Oldsmobile went out of business. Buick still sells. General Motors use common parts on many of their cars. Many aftermarket manufacturers too. No parts problems. I don't know which country you're in so I can't direct you anywhere. Many used cars are exported from the USA to countries that don't have a throw away mentality and value our used products higher than we do. Check with a used car broker in your area.