Swann NHD 805 will work with your existing dvr,the only thing is that they are not POE so you have to power them with 12 Dc.
https://www.amazon.com/Swann-SRNHD-805BK4-US-NHD-805-Security-Cameras/dp/B077NB3LML/ref=sr_1_2?ie=UTF8&qid=1524438250&sr=8-2&keywords=swann+805