Good luck with that. I did the same thing back in April '15. I took me until Sept '15 before I found one off of Ebay. They were scarce back then so I can't imagine what it will be like now. You can buy one off of Will's website (or you could in '15) but it cost $30 back then.
Hope you find one. Keep on checking Ebay, only two of his patterns were there just now when I looked. Sorry do not want to sell mine just yet.