Janis Saffel's Kickbox Strike Zone has a segment where you use a target pad held by a partner. I used my bag for this section (and because they switch roles so each partner gets to do the punchint/kicking, if you do it this way by yourself, you get double the workout).
Illaria Montanani made a Powerstrike bag workout years ago. It would be hard to find because it's OOP.