Looking for correct Hub for motor

Hi everyone, so I recently purchased a motor from advanced motors and drives- fb1-4001a. Ill attach a photo with this so you can see. Anyways I'm in the process of making a adapter plate and coupler to attach it to my VW Vanagon and I'm having trouble determining the correct hub to fit on the key shaft. I looked on the makers website, http://www.evmotors.com.au/ , but they don't specify the size of the two shafts. I was wondering if anyone could tell me the size of the shafts or even better, a link to the appropriate hub to purchase. Thanks!