Yarichin Bitch Club Second Episode
From The Lost Media Wiki
A couple of weeks ago I found a DVD bundle for the previously lost episode for the OVA, Yarichin Bitch Club. To my knowledge, you can still buy the DVD.
The link still being up and the fact you can put in your credit card details on the purchase page makes me believe you can still buy it.
https://tohoanimationstore.com/shop/g/gTASD00807/
Please note that Yarichin contains NSFW content that is shown on the web page,