The Netherlands were to be supplied with Patton tanks under the MDAP, along with the Armies of Belgium, Denmark and others. Due to the Korean war, the US needed to divert their supply of Patton tanks, so they bought Centurion tanks in the UK and supplied them to the Netherlands and Denmark. Being US property, the Cents were handed back after they were struck off charge. So contrary to popular belief, the Netherlands did not sell Cents to Austria and Israel, the US did and supplied them from MDAP stocks in the Netherlands.
HTH,
Hanno