Mike - you bring back fond memories for me. When MOC was new and they had: buttons, coins, shirts, decals etc..
Now you will be hard pressed to find a shirt. There is one member in your area who may have a stash?? Dougwg but the odds are low that he will part with anything. However if you ever need any customization of your pistols or long guns he's a wizard of wicked slide serrations, engraving, gunsmithing and holds a class 7 FFL if I remember correctly. They also make custom billets for muscle cars (thought you'd like that since you are a mechanic).
American Tool & Engraving Inc.
Taylor, MI 48180