So, our thrifty friend Abbie, decided to make her own. That got us doing a little research of our own...
One of the most comprehensive sites we found was The Baby Wearer.com . Their site will lead you to instructions for just about any kind of sling you want to make.
Over at My Karma Baby.com we found great instructions including information and links on where to find great fabrics.
If you favor the Maya Wrap, their website has the complete instructions to duplicate it with your own fabric.
This should get you started. Any other experienced DIY Sling Makers out there- give us your tips.