paint gun help?

i got a matco gravity feed gun i got a few years back. i need to find parts for it! there is no numbers on the gun at all. ive taking it in to a few paint shops with no luck. so i was hoping someone on here can help me find a needle a tip for it. it has a 1.3 now but need a 2.0 for spraying my primers.

so if someone knows anything about who makes there guns would be a big help.. thanks