CM3200B Cable modem - Power connector

We as a company have been using the CM820B Cable modem. (240 volt internal PSU)

We now want to purchase 100 * CM3200B Devices. 12 volt  external PSU.

Cannot find specs for the DC power connector.

We need  a “Brick” type PSU 12 volt @ 2 Amp - 2.1 * 5. 5 mm connector does not fit (5.5 to big)

Measured supplied PSU  connector @ 1.1 * 5.1mm.

Anyone know a “brick” PSU that will work or can confirm the actual size of the connector on the CM3200B