Unfortunately, like Dissident Voice which also has carried articles from WSM members, Countercurrents publishes views and opinions of writers that we as an organisation cannot be seen to endorse.
Informal word of mouth is more appropriate. Spintcom and Spopen are available to publicise various media outlets that can be approached.
I am sure there are others that simply have passed under our radar
Weekly Worker is another which has a very open editorial policy to letters that we could avail ourselves of more.