Hi, HAST2 is on Amazon – https://www.amazon.co.uk/HAST-2-Version-Helen-Arkell-Spelling/dp/0956407536/ref=nodl_?dplnkId=358f0710-4ead-4ba0-b889-49a319614bfa
It’s currently £55
It lists diagnostic stuff at the back, parallel forms. Outreach services use it.