Summary

This is a set of brackets that attaches your Pi + official 7" display sandwich to a keyboard, turning it into a sort-of laptop!

The bracket is made for a generic no-name (well, Westrom, but there's no trace of it on the internet) wireless 2.4ghz keyboard, so most likely you'll have to modify it to fit yours.
I've attached the Fusion 360 file, it should be easily modifiable by just amending the 1st sketch with your dimensions.