I don't recommend the retractable leashes, but, you should be able to find a long leash at any place that sells pet supplies. You can also just fashion a leash out of rope or something from home depot or lowe's. I know that's what my friend did. She just tied a really long rope around the dog's collar. Not the prettiest thing, but, served it's purpose...wasn't very good on her hands! Don't tie it around the dog's neck, obviously, but, if you double knot it around the collar, it should be fine. I'd think you could find a leash, though, if you just look for a pet store...that's weird that your walmart doesn't have one...do you have a target? I've even seen them at grocery stores before.