I found these two:http://www.amazon.co.uk/Exact-Lenovo-Ideatab-A8-50-Series-Black/dp/B00KGLC1GY/ref=lh_ni_t?ie=UTF8&psc=1&smid=A1ROUIUNOX8HRJhttp://www.amazon.co.uk/Fintie-Lenovo-IdeaTab-8-Inch-Android/dp/B00KQFM142/ref=sr_1_9?s=electronics&ie=UTF8&qid=1420821853&sr=1-9&keywords=a8-50+case
which look much the same but they seem more limited than my Mum's current Sero 7 Pro case, which has an elastic strap to keep it closed, a couple of notches in the flap for two different landscape angles and can fold back and be held comfortably in portrait, which the reviews for these suggest isn't possible.
I'm also concerned that they might block the SD/SIM slot, as my Mum might need to access the SIM quite frequently and I'm also concerned to get something that has a nice feel, as the Sero 7 Pro case does but which seems to lacking on some, otherwise well-reviewed, cases such as this http://www.amazon.co.uk/IVSO-Slim-Book-Lenovo-IdeaTab-8-Inch/dp/B00K5E7L6M/ref=sr_1_2?s=electronics&ie=UTF8&qid=1420821853&sr=1-2&keywords=a8-50+case
Also would appreciate recommendations for a decent screen protector for it, as I got some for my Wikipad that turned out to create quite a bit of resistance when dragging fingers across, which feels awful, so I don't want to repeat that mistake. I generally prefer to get the matte ones to help reduce glare, although the A8-50 is probably no more suitable to be used in daylight than the Sero 7 Pro is. Still, you get glare indoors from lighting, etc, so I figure it's useful.