My family are visiting the Kennedy Space Center soon, so I wanted to make my wife some earrings for the occasion. I worked this up in TinkerCAD. I eyeballed it from some photos of a Mercury capsule, so the dimensions are going to be off from the real thing. Still, it's pretty close. Got the hardware from Hobby Lobby and found a somewhat correct size decal from an old model kit.
Some light sanding is needed on the bottom because of the supports. I just primed the bottom after sanding and painted it black. The small retro pack on the bottom was painted a dark gull grey and I painted the three retro-pack straps on with dark gull gray. A coat of matte clear coat will help if you want to put a decal on it.