Well, there is a blog written by an ATM employee at http://bkkcurtain.wordpress.com/
But there are no catalogues in that blog, I might tell him to post some pics of our products, but we mainly sell the textiles/fabric, however we focus mainly on custom made curtains for customers. Regarding beds however, we do have a ready made kingsize bedsheet along with 2 standard size pillow cases if you are interested.
Our bedsheets are only 199 baht to 249 baht per meter 100% cotton, and each meter has a width of 2.80 meters, basically you can get a kingsize bed for 3 meters or 597 baht for the material, the stitching is about another 300-400 baht, so basically you can get kingsize bedsheets for less than a 1000 baht. At places like Emporium and Siam Paragon, 100% cotton kingsize bedsheets would set you back by about 4000 baht, I should know as I am the one selling the materials/fabrics to them :)