Tyler,  I believe the Perlee workshop is in Amsterdam, plus a short
drive or train ride south to Utrecht is the National Museum "From
Musical Clocks to Barrel Organs" where a large collection of mechanical
instruments up to large dance and fair organs can be heard.

You would have to look on their web site for the hours and days they
are open.  I believe they are closed on Mondays.  It's not far from the
train station if I remember correctly.  There's also the draaiorgel
museum in Haarlem which features several Dutch street organs and a
large Marenghi/Frei organ, "Het Kunkelsorgel".

I hope that helps a little.
Bill Griswold
Oxford, Connecticut