I wanted to have a decent "Leather"-Case for my HP Stream7 Windows8.1 tablet. As the only ones i could find had only leather flaps holding the machine i decided to make a small hardcase which will grab the tablet by the edges and leave all the other parts free.
After that i found a small leathercase (originally Amazonbasics, currently not available anymore) in which the holder is attached via small rubberbands(see pictures).
The tablet is fairly well fixed but also quite easy to detach.
Btw. i found out that also an old Leatherjacket for a kindlekeyboard fits (very "snuggly" but fits).