KingTool Self-Retracting Box Cutter with Holster & Belt Clip, Auto Retractable Safety Utility Knife with Total 10PCS SK5 blades, Aaluminum Shell with Rubber Grip, Sturdy & Strong - Amazon.com
FC Folding Pocket Utility Knife - Heavy Duty Box Cutter with Holster, Quick Change Blades, Lock-Back Design, and Lightweight Aluminum Body - Amazon.com
Pacific Handy Cutter UKH423 Plastic Swivel Holster for S5, S4 and S4S, Clips on Belts, Pants and Pockets, Safety Holster for Box Cutters and Utility Knives, Black (New A41005-7) - Amazon.com
Safety Knife with Holster | Spec Ops Tools
Holster for RAZE and Tape Splitter
These tabs on my box cutter holster : r/Whatisthis
GarveyProducts.com: Online shopping for Labelers, Taggers, Box Cutters, Shopping Baskets & more
Delphin 03 Utility Knife with Holster - Lee Valley Tools