There was a startup company that was working on a desktop metal laser sintering printer a while back on one of the crowd funding sites. I just tried to find them but didn't have any luck. I don't know how their campaign went or if it was successful. I have yet to see a desktop 3D metal printer. Look into having something like shapeways do your cuff links if it's a one off project. Other wise, most resin SLA/DLP printers (like the one used on my youtube channel linked in my signature) can use investment casting resin to make metal parts.