Does anyone know a source for Stretch Fabric Extrusions (example: http://www.fabritrak.com/TrakProfiles.asp). There are a number of manufactures but they don't sell to individauls. These seems like a great way to cover walls. Just attach the extrusions, attach the sound proofing material Ie: OC 703, and stretch the fabric over it. These extrusions look like a really clean way of doing it. Anyone have experience in this area?