OldSynths

I have an CS-30 and I am looking to get spare parts to keep alive and restore also the synth
¿Use all the small CS (5/10/15) the same parts ¿
Same plastic ends?
Knobs (I believe) but also the value pots?
Yamaha IC,s (very rare and expensive? ¿keys? ? all other elect.comp.....
Please let me know because I have the option to buy for a very cheap price an 5 and 10.

thank you in advance
Jan