I could find no other source other than SoHum.
Do you have any friends in California?
Sweet Seeds have quite a few high CBD strains with almost no THC, that I have grown and can recommend, especially their Sweet Pure CBD, with a 1:15 to a 1:20 ratio of THC to CBD and THC levels of between 0.4 and 1.0%.
I find this strain excellent for reducing muscle spasm and knotted muscles too, a legacy of a severe accident 30 odd years ago.
She is a photoperiod plant that performs really well and with great yields, they also have a number of CBD rich autos too, including a red flowering one with less than 0.5% THC and CBD levels of 15-17% and with absolutely no high at all.
Pev Grow in Spain will ship them World wide and at a better price point than getting them direct from Sweet Seeds themselves.
Hope this helps,............
Organoman.
(and lover of Sweet Seeds!)