Personalized radio strap?
Higher end leather portfolio embossed?
This is what we do at our PD for retirements (could easily do it with a promotion in the FD etc) but we take a long sleeve shirt sleeve with dept patch, rank markings, longevity markings etc and have just the sleeve matted and framed in a nice frame. Engraved tag with Officers info, years of service and special unit info on it. Usually have dept award ribbons mounted in the upper left corner of the mat too.
Not sure where our Chief gets em done (I'm guess at a local trophy type shop) but they always look very classy and are one of the more unique gifts that I have seen over my career.
edit: disregard just saw that you want something practical to use on the job.