postkillacct - get domains and park on another account

I'm looking for a way that I can have a script which automatically parks any domains (main domain, parked domains & addon domains) which are on an account on termination to another cPanel account.

Basically want it so when delete clients accounts if they have domains still pointing to our DNS we can direct them to a parking/terminated page.

If possible would be good to check if the domain points to an IP on the server before parking it.

Any tips on how I can achieve this.