I may be able to send you a sample, or you might be able to make it yourself, or if you are part of a university or aerospace firm, have them make it. My email address is email@example.com
. I teach at a university... and am not in the commercial business.
The scraps I have are about .080 inches thick, or about 2 mm, as you mentioned, but since they have been made with graphite fiber, they would hold hundreds or thousands of pounds, if you can keep the stuff gripped. One is at +15 degrees/-15 degrees, and the other is at +5/-5 relative to the long axis.
TO make it: First find out how to laminate (vacuum-bag) a composite....try composites.about.com. Obtain a plain-weave cloth, such as graphite or fiberglass, with a loose weave. Cut a square piece out, parallel to the fibers. Gently pull on opposite corners of the cloth, so that the fibers "scissor". Align the cloth on some reference mark so that you have a (+theta/-theta) laminate. The smaller theta is, the bigger the mis-match between axial and transverse stiffness, and the easier it will be to roll, and the thinner the stack, the easier it will be to roll. With cloth, the smallest theta you may be able to get will be about 15 degrees. Stack as many layers as needed. Impregnate the cloth layers with a two-part urethane resin, about shore A 30 hardness. Finish the vacuum bagging, and let cure under vacuum. After curing debag, and cut to size.
An alternate method is to make a symmetric stack of unidirectional cloth and impregnate the resin.
Since the urethane resin is more viscous or thicker than a typical polyester or epoxy, the fibers tend to get smeared around during impregnation if one isn't careful.
We use a filament winder, and have a large diameter mandrel. If I want a +15/-15 laminate, I wind a +75/-75 band onto the mandrel and apply the resin during winding. After winding, but before cure, I cut the band along a slot in the mandrel, remove the composite and vacuum bag it flat, or fold it for extra thickness (I am leaving out a lot of steps with peel ply & etc), and then cure it flat under a vacuum and in an oven. I can get high quality laminates that way, at any angle I choose, with any fiber that can be filament wound.
Back to your requrements.... it doesn't appear that you will need a 2 mm thickness for the loads you desire to carry if you use fiberglass or graphite, perhaps you would if you wanted to use another fiber.
YOu can click on my username for some of my other postings that may give additional information... I hope this is helpful.