I think that you will have to use original parts from Heidelberg. There probably is not an after market supplier. Heidelberg themselves might be using use an outside supplier for small gears that you are describing. You might have to pay the piper on this one.
You can try a Baum dealer seeing that they Baum makes the presses now. tompkins.com we sell baum bp 18/qm parts. Some stuff is cheaper some are more depends on parts even thought they are the same.
From what I see in the second picture that tou sent the parts you need are for a PM 74. Baum would not carry those. Baum makes the updated version of the Printmaster 46.
