Check out JC Penny's they carry several different ones there. I wanted more of the blinds because light still comes in from the top and sides of a curtain. My room is pitch black, just the way I like it.
I recommend target also. I bought some nice panels for my sons room. Another option if your putting a valance also is lowes sells blackout roller shade. Used these in my daughters rooms for nap time when they were youger. Not fabric but a valance hid it underneath . Bed bath now has blackout fabric roman shades I saw a few weeks ago. STore is limited but online more to pick from