Where to buy new wing covers?

I have a Pterodactyl Ascender that needs a new wing cover.

Where can I get such a thing?
What vendors out there should I chase?

Any leads would be appreciated.

Thanks

There's a guy in the Midland, Bay City, Saginaw, MI area that makes sails. http://michigansportpilotrepair.com/great-sails.html

That's a big help! Thanks!