Any convex mirror would do [1],[7] [1] https://www.ebay.com/itm/10cm-Diameter-Focal-Convex-Mirror-Lens-w-Stand-Light-Reflection-Teaching-Toy/391935002641?_trkp

Any convex mirror would do [1],[7] [1] https://www.ebay.com/itm/10cm-Diameter-Focal-Convex-Mirror-Lens-w-Stand-Light-Reflection-Teaching-Toy/391935002641?_trkparms=ispr%3D1&hash=item5b41258811:g:3wQAAOSwcH5b~97b https://www.ebay.com/itm/10cm-Diameter-Focal-Convex-Mirror-L... [7] https://www.amazon.com/Computer-Rear-View-Personal-Security-Monitors/dp/B07H9BGLPN/ref=mp_s_a_1_9?dchild=1&keywords=monitor+mirror&qid=1594531734&sr=8-9 https://www.amazon.com/Computer-Rear-View-Personal-Security-...