Thought I'd share this in case any others are looking for a copy. I was bummed to find physical copies are no longer available, but ended up finding a link through her site to purchase the PDF. After you send payment, they will send a WeTransfer link to download (I got mine the next day)
Here's the purchase link: https://sorben.de/shoproot/product_info.php?products_id=3
There is also a German copy available here: https://sorben.de/shoproot/product_info.php?products_id=2