You can also buy fabric to make you own moby wrap for about $9. Just need 5 yds of jersey fabric (stretchy but not too stretchy), cut it so that its 20 inches wide (so if the fabric is 60 inches wide, you end up with 3 wraps, haha). The jersey fabric doesn't fray so if you wash it once, ,the edges just curl up a little bit. Then you fasten it just like a regular moby wrap.
Instructions
Just remember that where the "moby" tag is, its just right in the middle of the length of fabric so that should help you when putting it on. Much cheaper than a real moby, especially since you aren't using it forever!