I've bought six of these (two sets) from Amazon and I've been very happy with them: https://smile.amazon.com/gp/product/B00C3NCA64/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

I also bought these but haven't put them into service yet: https://smile.amazon.com/gp/product/B00QG1ZF48/ref=oh_aui_search_detailpage?ie=UTF8&psc=1