Midway, Natchez, and Midsouth all show as being out of stock on 218 Bee brass.
You might check with Sinclair:
http://www.sinclairintl.com/index.html
I can't tell for sure from their website whether they have it in stock or not.
As Rocky said, Winchester makes a run of the stuff once a year. In the past, I've found seasonal brass at Sinclair a few times when other suppliers had run out.