Kanban PO Rel Auto notify/email

Hi. I am new to this and I was wondering if anyone out there has created a BPM to auto notify/email someone when a new PO release is created on Kanban part. As what I know, when a quantity on a kanban part goes below the min qty level, it auto creates a PO Rel on the PO we have set up under part maintenance. I enabled Trace Logging and adjusted my quantity to below the min. It created a new PO release but I couldn't find any Business Object I could use. Our goal is to automate the notification to both the buyer and vendor of new PO Releases for a kanban part. Any help will be much appreciated.