DIY style Recently switched to this one - eBay $4.53 - https://www.ebay.com/itm/P-51-Mustang-Remove-Before-Flight-Embroidered-Aviation-keyring-fob-tag-New/153216570740?ssPageName=STRK:MEBIDX:IT&_trksid=p2060353.m2749.l2649 (Doesn't come with the hardware to attach).