Webfabrics.com has Fusions jelly rolls. They have all of the blues in one jelly, all the pinks, purples, yellows, etc. for $23.50 each. That would cost $94 to get 4 sets.
They also have two jelly rolls of ALL 139 fabrics, one set of lights and one set of darks, for $27.95 each. That would cost $55.90 to get both of them. That may be the better option. I only need four 2 1/2" x 8 1/2" pieces of each color so out of one strip (40") I could get 4.7 pieces.
139 strips x 4 pieces each = 556 pieces.
Each color needs 48 pieces x 4 colors = 192 pieces.
I could get well over 2 quilts out of the two jelly rolls.