Report Server notification when reports are complete

Currently, we have the capability to e-mail results (excel, png) to our customer base when the report(s) are 100% complete. Is there a way to only send an e-mail notification to our customer base that the reports are complete versus attaching the output?  We have built a mechanism for customers to access reports which are published to our internal wiki and would like to stop e-mailing the reports but continue to send a notification that they're

available.