[sdiy] -- Pro one clone ? --

[Andrea TONI]

Hello,

I am considering a rack unit PRO One clone 

I been studying the schematics and i am a little concern on the 
availability of the following chips 

AD558 
cpu 8021 
CEM 3340 3320 3310 

Are they available ? where ? pricing ? 

everything else seems easily available,  isn't it ? 

Tnx in advance 

Regards
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