Here is a link to the repair manual: https://servicemanuals.us/sony/audio/srs-x77.html?limit=1&start=0
I'm not sure what you mean by the "clips", but on pages 33-37 provides the exploded views of each section and provides part numbers of the individual parts. Find the part number for the "clips", and then start with a google search. If you come back and post the part number in the comments, I'll see if I can help locate it.