Sending Attachement along with PO to Vendor via Email using ME9F.

Hello folks

Currently we are sending PO form to the vendor by email (email output type) using the standard tcode ME9F. Now our requirement is, user want to attach another PDF attachment along with the PO form while sending email to the vendor. If the attachment is saved in the PO (ME22N) is it possible to send it along with the PO form using ME9F?

If not that way, can we send additional attachment using a custom program? Please advise.

Thanks in advance

Santosh