While casually browsing /r/sleeperbattlestations I found this post by someone who found a shop that still has some very nice NOS Foxconn AEI-AP4F8 cases on sale. They are very cheap at 35$ (or 25$ for a lot size of 10):
https://store.cwc-group.com/fostcocabeco.html

Seems to be available on Newegg, too, but more expensive:
https://www.newegg.com/beige-foxconn-elite-at … /2AM-000S-00095

So for those of you based in the US, this might be a great chance to grab a NOS beige case. Just wanted to leave this here, you don't find NOS beige cases very often nowadays, let alone at this price point. If they were located in the EU, I'd immediately order one.
Disclaimer: I am not affiliated with this shop in any way.