I did the same years ago. Got some imported one from eBay. Only identifying marks on it are "Made in Japan" on the handle and a triangle cast in on one side. It came with dies of a few sizes and matching grommets. What I discovered later was that the dies are all metric so standard grommets sizes offered here in the US do not fit right.
After some careful measuring of the dies and a couple of emails and photos back and forth - I took the plunge and ordered a #2 die for a Sooper Ace machine from Image One - it fits perfect and now I can use their grommets.
The machine itself is nice, heavy, and well built. You just cannot get original dies for it and getting metric grommets is a pain here. That being said - what I did is an option you could explore for the machine you have. Otherwise I'd go with what was already posted and get a Hiker, Stimpson, or Fasnap press as they are the most widely known and should never be a problem to get the correct grommets or new dies for them. I've also found that getting the brand grommets specifically for your machine works best.