The Drift Series 1 Complete box set has gone up for purchase on a number of retailers. Here are a few links:
Amazon (US): https://amzn.to/3lvcXAR
Amazon (UK): https://amzn.to/3hIen91
ImportCDs (plus shipping): $32.99
Bull Moose (free shipping): $36.97
Japan Release Date: September 14, 2020
UK Release Date: September 18, 2020
EU Release Date: September 25, 2020
US Release Date: October 2, 2020