In search of Chung Do Kwan books

[HYtkd]

I'm looking for any books, student manuals, etc from the kwan era or that focus on the style of that era. I own both of GM Duk Sung Son's books already. I have heard of GM Kuk Won Lee also having a small book (probably out of any price range for me) published. I know the World Taekwondo Association of GM Son had at minimum two manuals (silver and red), and have heard GM Dong Hoon Kim out of Arizona (has Chung Do Kwan/WTA lineage) having a red manual. It could be the same as the GM Son's WTA red manual or may be different. Are there other books out there I should be looking for? Does anyone have copies of the WTA manuals they might part with for a price? I did pick up a copy of Funakoshi's book, which has some interesting differences. PDFs work just as well as physical books. Thanks