HP 28S battery cover replacement

[dylanmc]

New here, but long time HP calculator fan/owner.

My 28S's battery cover is no longer (surprise, surprise), and I see from this post:

http://www.hpmuseum.org/cgi-sys/cgiwrap/...467#217467

That someone has created a very clever, very sturdy replacement. I couldn't respond to that thread asking how to order one, so am appealing here: are there instructions for making one of these, or a place to order them anywhere?

thanks!
dylan mcnamee
Portland, Oregon