As Leon said one source is Ebay, they come up at regular intervals, several in the last month. Check out this one.EbayOriginally Posted by Snapper
The mechanical clamp type are heavy. Generally you need a press larger than your print, but you can mount larger prints by moveing them and taking several "bites" at the job. Vacuum presses are also available, which are a lot lighter, but fetch much higher prices.