I briefly researched this to see if I could make more financial sense getting my own hot-stamper than getting my chips monogrammed by the vendor.
szxAszDXSCYou can google around for "hot foil stamp machine" and find the occasional one for sale. In fact
here's a link to one on ebay that comes with a bunch of accessories.
The "nice" ones were all up in the $1000 range, though.