Where and what is the best power supply to buy for Orange Pi?

Question

Electronics

I bought a small batch of Orange Pi, but as it turned out, in our city it is very difficult to purchase the required power supplies.
Given that there are a couple of Banana Pi and Raspberry Pi in the arsenal, and I would like to unify the node, the task becomes more complicated (Orange Pi is powered by a barrel jack (from 1.5 to 2A), and Banana Pi (from 2A) and Raspberry Pi (from 700mA to ?) from micro USB).
The plans are to order about 10 power supplies (eg 5V/2A).
Please help with the choice of power supplies.
I would be grateful for any advice.