Eurocutter 1380 Display AD knife button trouble

Hi Again All,
In addition to the troubles with the clamp on this cutter, another trouble has just popped up again.
It seems that the plastic parts inside the knife buttons that have at least a million hits on them are starting to fall apart, causing intermittent failure to actuate. MZE Germany, the "manufacturer" (Made in Korea, I think) is currently "restructuring" its USA distribution network...and I'm looking for a source of the knife button assemblies for two of these machines.
Any help greatly appreciated!
Regards,
Scott