Where can I find different equestris varieties?

[camille1585]

If it's the same in the US as in Europe, it's hard to find any one place that sells several types of equestris. Aside from the suggestions already mentioned above, you can check out the vendor feedback forum for recommended nurseries, and look to see what sort of equestris plants they may have.
I checked a few other sites, and Hausermann has equestris var coerulea.
Don't hesitate to email or call nurseries, they may have other types but not in high enough numbers to list online.