Pre-sewn corner bumpers are available through robopromo.com. No cutting or sewing necessary. Here's a helpful video that that shows you how simple it is!
https://www.youtube.com/watch?v=EEzMRmLnBHQ
There's also a corner bumper cover that we offer for quick color change. Here is the link to that video:
https://www.youtube.com/watch?v=gQDptM_XULM