Just ordered one of these to see if it's any good - will be testing it on HU before I route all the cabling..
https://www.amazon.co.uk/Greatek-Backup-Waterproof-License-Reverse/dp/B077BNMXSX/ref=sr_1_1?ie=UTF8&qid=1525074521&sr=8-1&keywords=greatek+gt86+brz