I get your urgency. It sucks trial sponsors left you hanging. But there are SO MANY variables since this is all grey market, without a script. Experienced folks have seen others make rash, harmful decisions. That's why they say go slow, do homework.
I needed to understand the forum, Reddit, Discord, and Telegram. Who seemed trustworthy? Different vendors (domestic and overseas), user opinions, recent customer service issues, testing, vendors with safety issues, group tests, payments, reconstitution, Hospira Bac water, dosage schedule. That's just a start.
I bought my first vial and supplies from a domestic shop with less knowledge. I wouldn't now. I survived, but I cringe now.