"Kingham (MTM) will make a custom case but you will need to provide a drawing. It's certainly not the cheapest option. Alternately search for a parlour guitar case or perhaps a 3/4. Check dimensions first though."
"I haven't got the book but I'm fairly certain that it's concerned with the modern classical guitar. There are various plans available for baroque guitars, that and various snippets of information from the web is sufficient to build…"