I purchase online from a place on ebay. Free shipping and it's 96" wide by 36 yard rolls for 110.00 (when they have a sale, usually 125.00 I think). This for the 4 oz, the same price for thicker, but less yards on the roll. I have the 6 and 8 oz...100% polyester. My customers like the loft of the 4 oz.
I buy the 4oz in the 2 bolt packs, a bit cheaper still.
I also had a bolt of warm and white...took 4 years to use it up...customers wanted more loft. Finally found one customer wanting it...used it in her quilts at cost, and now that it's gone & we used the 4oz on one of her quilts...she's a convert.