I spoke to a car audio place about dynamat. They told me it was so expensive they could barely turn a profit so they dropped it. I asked them what was cheap, they recommended just buying house insulation or something and using a few layers of that. He said it was heavy though..
I was like I dont want house insulation or whatever in my house.
jerks
Here is a website that has some material that is the very same as Dynomat Regular, but sells for about the 3rd of the price. I have used some of it before and had pretty good results. It is exactly the same as Dynomat, just doesn't have the name stamped on it. Do a search on the website for part number 9709T19. It is near the bottom of the search result and should be highlighted in yellow. Let me know if this helps.
I used FatMat, $100 for 100 sq feet on Ebay. Check the pics in my sig. It smelled for a day or two, but it was so worth it. Tons less rattles and exhaust drone.