Does anyone own a Northstar tile press? A chunk of Hydrostone broke off one of the rings on my press and I can no longer make tiles. I would really appreciate any advice on how to repair this. I can't seem to find any info on the Internet. I would also be interested in purchasing two functioning Hydro stone rings if somebody wants to sell them. I guess Northstar stopped making the press years ago. The bottom of the tile says precision terrafirma. I can't find info on that company either. Thank you and have a great day.