A Digital Printing Network
Jenn, I know this is an old post, but I have a 3' Tennsmith shear that I use to cut various sizes. I would be willing to help you out if you haven't found a solution yet.
I don't know the brand of the cutter I have, but the blade holder is all cast steel or iron-base is all cast also. not the newer lightweight models that look more like an upgraded paper cutter. (like JDS carries) 12" width of cut-I've been using it for probably 9-10 years now. Your 'sheet' stock you can get through almost any engraving supplier-I buy it precut to 12" x 24". I use only a diamond drag/rotating spindle engraver-no laser, so I can use any material. You have to make sure you buy ONLY material designated LASER engravable. ZAK PLASTICS is a good supplier for blanks, they will precut quantities of any size for you, and carry a lot of equipment.
I checked several of my catalogs and it looks like everyone now carries the lightweight material cutters. You may not be able to find the one I have. I just looked-and no brand name on it anywhere-just a model number or something.