For the true collector, the most reliable method for obtaining a digital copy of the series is to purchase the physical media and rip it yourself.
Additionally, physical media is making a comeback. Companies like have rescued obscure 90s and 2000s anime. A fan campaign requesting a Papyrus Blu-ray with a digital download code could convince a boutique label to pick it up. Papyrus Cartoon Series Download
For the true collector, the most reliable method for obtaining a digital copy of the series is to purchase the physical media and rip it yourself.
Additionally, physical media is making a comeback. Companies like have rescued obscure 90s and 2000s anime. A fan campaign requesting a Papyrus Blu-ray with a digital download code could convince a boutique label to pick it up.