Don't everything listen to 'your friend'.
A lot of cases people kantoi because listen to their 'friend'.

Better go ask a a few good mechanic for their advice.
I seriously don't believe that there are no spareparts for locally made cars..
As long as you can pay for it, surely can find it.
Also Proton cars are not 100% designed from scratch, often some other car brands' parts are used, so maybe you can find out and ask those brands' spareparts dealers.