Just a note to share positive feedback about the Bolex S321 manuals which I ordered from OTC (www.printed-manual.com).
Certainly, original manuals in good condition are best, but these reprints from OTC were of high-quality, professionally bound, and packaged well for shipping.
The User Manual was $13.95 USD and the Repair Manual was $13.95. The shipping to the US was $9.95, which seems pretty reasonable to me. Spiral binding was free with a discount code.