Selecting comparable yarn? How?

[LREVS]

I am knitting a patchwork baby blanket. I used 2 colors that I already had: Bernat Softee Baby -- Light (3). For the 3rd color, I want to use a color close to orange -- Bernat Softee Baby doesn't have this. I already bought a skein of yarn that ended up being too heavyweight. I think I'll need to order something on-line, since my area stores only carry the typical baby colors. Any suggestions for yarns that are comparable in weight and 100% acrylic, like the Bernat Softee Baby? Thanks!