This is an open question at the moment.
I’m trying to put together a list for the folks not in the USA or Australia. So please bear with me.
These are people that I know and trust. I may not have met them in person, but I think they will be fair and reasonable to deal with :
Julie Pettit – https://www.facebook.com/juliescompostshop/?pnref=lhc
The United States
Tom Huffman – http://www.texaswormfarm.com/