I just got an Arnold Grummer on myself. It says that the company is Greg Markim, Inc. Milwaukee, Wi. You could do a search on that.

Taunia,
I'm not sure exactly what you need but I have made moulds and deckles out of stretcher bars that I glue and screw together. I used nylon sheer curtains on the mold. The mould and deckle are the same size and are usually the size of the paper you want.

The Palimsest site had a couple of points that I found interesting. The first was to put an extra lip on the deckle so that it fits the mould like a box top to prevent slipping. Good idea for a larger piece since they are more difficult to hold.

The other good idea is that the larger deckle could be fitted with several frames to speed production. I have used plastic stencils this way.

I hope these links help.

Palimsest
ArtsySmartsy
American Museum of Papermaking
BBC
good picture of mould

Here's another site for deckle making...just change the demensions to the size you'd want. They use the plastic window screening. I have also heard that folks do it with "found" picture frames....if you see any at garage sales....
Deckle href>
Someday I'm gonna make a larger one too...LOL!
Tiger