source for obsolete trans?

[mark verbos]

I am looking at some old schematics and they are filled with transistors 
that I can't find in Mouser, Digikey, Allied, Elextronics express...

where can these be found? any suggestions?

2n3565
2n3566
2n4342
2n4341
2n4339
2n1711
2n4355
ITE4339
ITE3802
ITE122

should I just use modern replacements?
--
mark verbos

"I think the future of analog modulars is to build them yourself." 

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