Dear Sir,
maybe you should try to contact those guys:
Czechoslovak Historic Flight - Contact.
I am sorry - not participating in active flying nor aircraft restoring, but I do not know how many pieces survived out of 260-280 engines produced.
As a secondary source about the situation within this part of Czech aviation community, you can try to contact this group:
Team | Aviators.cz
The factory, as you probably know, still exists as a part of GE.
Hope it helps a bit, Sir.
All the best
Mirko