OK, by "exories" I assume you mean "accessories"??
And to access (not "axes") the site: http://www.cosworx.com/
Perhaps your browser doesn't find it because you misspelled it as "Crossworxs". (I have also fixed this thread's title spelling.)
Cosworx sells Wonderflex, which are flat sheets of thermoplastic, not much thicker than posterboard, that you can cut and heat with a heat gun to shape it. It can also be made to stick to itself when heated. It has an attached synthetic fiber weave embedded in it, and can be stretched on the bias (diagonal). When it is hot, it can be formed over foam (not "fome"), or pressed into a mold. It may not come with instructions, so you need to look it up on the internet.
Here is a Cosplay.com Wonderflex thread, which is very helpful:
Cosworx also sells Fosshape, which is similar to the stiff fabric used for making hats, and can be sewn and heat-shaped. (Again, check the internet for directions.)