Distiller is exclusively included as a component of the paid Adobe Acrobat Pro or Standard packages. You cannot buy or license it separately.
Finding a standalone can be tricky because Adobe no longer offers it as a separate product. However, if you're looking to handle PostScript files or create high-quality PDFs, there are official ways to access it and modern alternatives available. What is Adobe Acrobat Distiller? Adobe Acrobat Distiller Free Download For Windows 10
If you need a press-ready PDF quickly and don't want to learn command line, is your best bet. Install it, select "High Quality Print" or "Press Quality" profile, and print your document to the PDFCreator virtual printer. It is not Distiller, but for 95% of tasks, it works perfectly. Distiller is exclusively included as a component of