I missed your thread, put a link up here please.
So from your post im assuming that most farmers can get it from the agric chemists along with wormer and hoof powder! If your in the know?
The article link is in my post. I'm not sure how readily avaiable the viral base is to the general public but it would be interesting to find out.
http://www.thehuntinglife.com/forums/topic/215944-what-causes-mixi/page__st__15