I also started the lid and flap. Here I'm just getting some boards in place prior to glue up.
The lid is attached to the case (in the back) with three hinges. The flap (which covers the keyboard) is attached to the lid with three more hinges, and there is also a lock on the flap. The hinges are drawn full-size on the plan and they are really cool. I wasn't particularly looking for exact replacements, but I learned there is a guy over in the UK who actually makes replicas of these (and many others). As you can imagine, they are not cheap- I'm guessing US $350 (plus shipping) for the set. You can check them out here: http://www.traditional-brassware.co.uk/ ... 1/spinets/
(in my case, references 13 - 16).