Hey Flatout,
I hate to bump old threads but I had to thank you for this. I'm working on building my own "Booker's Box" and these are incredibly helpful.
For anyone else interesting in creating their own reproduction, there a $10 plate for the top here:
http://www.etsy.com/listing/12853932...ox-plaqueplate
In case you're wondering; no, it's not me making them.
Also of interest is this whole set:
http://www.etsy.com/listing/15294421...te-bookers-box
Probably cheaper than buying the genuine article at $150, but more than I want to pay for an unofficial reproduction. Also shipping from Sweden is expensive!