: Likely refers to the production studio "Luxury Girl" (often abbreviated as LXG or LAXD in certain trackers). PPV-10527206
Then Alex remembered: part4 had been sent as a separate attachment to an automated backup notification. Searching the email server with the exact filename — bingo. Once downloaded and placed in the same folder, part4.rar allowed the archive to reconstruct seamlessly. LAXD-PPV-10527206.part4.rar