I use the 48cd Vaultz case from Walmart (cost $20USD). A Vaultz rep said that this size case is primarily sold by this department store chain.
https://www.mobileread.com/forums/sho...ghlight=vaultz
the reader fits into a mesh pocket on one side and the charger/LED lamp fits into the mest pocket on the other side.
The Vaultz case has a strap that you can use to tote the case on your shoulder. Although it may be bigger than what most people want, it seems quite sturdy and fits my needs.
http://www.ideastreamproducts.com/vaultz/Wallet.html