We can get 63 units in Australia from Adafruit. If you order today, we can dispatch this stock between Apr 23, 2021 - Apr 26, 2021.
Each pack contains 10 x single row, right angle male 1x36-pin long headers, 0.1" pitch, that can be stacked next to each other on a 0.1" grid and broken apart easily with pliers or diagonal cutters. They're even gold plated so they wont oxidize!