After a long wait, and one too many suspicious excuses from Dominic:
1. He was sick in hospital.
2. He lost the order I posted to him.
3. His hard drive failed and he is waiting for customers to contact him.
4. No reply to emails, or simply doesn't address the question (i.e. when will he post the kefir)
I googled "Dominic Anfiteatro Scam" and came across:
After complaining, Dom's wife organized and shipped the grains. Unfortunately Dom is going through a rough period and is falling behind with his orders.