I have these for blind spot: https://www.amazon.com/gp/product/B09P9NZDV9/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1, and this for trail https://www.aliexpress.us/item/2255800730328046.html?spm=a2g0o.order_list.order_list_main.5.601e1802s2dxKj&gatewayAdapt=glo2usa4itemAdapt (I have the 170deg model). Note that this camera is ~$11, I've had it over two years no and no issues.

I run a Heigh10, so 4 camera inputs.