I found the website where I purchased 60"-wide fusible tricot for $2.50 a yard. It's http://www.bblackandsons.com/
Welcome to the Quilting Board!
I would suggest NOT using Steam-a-Seam. I absolutely love S-a-S 2 Lite, and used it on a few different quilts and loved it. Then I was making costumes where I had to cut out hearts/crowns/spades (doing Alice in Wonderland) and the costumer chose satin for everything. So I used the S-a-S, and it didn't stick right to the satin. I had iron marks on the top, even at low heats, and the lower the heat, the more the satin and glue didn't stick. It still frayed horribly. So I suggest picking something else for satin.