Personally, if it was me, I would look for a Kwikprint Model 55. It's portable, bomb proof, and most use a simple robotemp controller. You can't beat them. I have about 8 in our production shop and rebuild them often. Foil stamping is a delicate balance between pressure, dwell, and temperature and springs will probably get in the way of that.
I have a dozen or so Kwikprints for sale in the New York area. Some 55's, 86's, and some goose neck stands. Reach out if youre in the area.