You've listed the Aviodrome in Lelystad, The Netherlands, but it's worth mentioning that they have the prototype and a single production example of the NHI H-3 Kolibri helicopter (see
https://en.wikipedia.org/wiki/NHI_H-3_Kolibrie), which together comprises the entire surviving population for this type.
The National Military Museum in Soesterberg, The Netherlands also has a few helicopters. See:
https://www.nmm.nl/en/