The distance is correct. It's that close because it's a really reduced range target. So, no there aren't any commercially available replacement targets. Office Depot (or places like that) should be able to print for you and some libraries have printers you can use as well.
When originally set up, part of the intent was that folks who didn't have access to a 200 yard range could still participate. At 13.5 yards most non-scoped rifles are "on" when they're zeroed for 100 yards