More information on external case, please. (Stretch goal #8)

[Marsupial]

In the #11 update email, there is mention of a external keyboard case.
This is interesting. And one of the stretch goals. (Stretch goal #8) 

Are there more information?

Making a c64 with external keyboard would be something else

[admin]

The stretch goal is to make a new perk, which is a stand alone product. Please see the BlingBox thread here:

https://www.cbmstuff.com/forum/showthread.php?tid=1091