NVR for existing IP cameras

Hi
Im using 3off ZP-IBI13-W and 1off SD-H2907 and they work fine accessing them via the Zmodo app. I want to add recording to my installation but I cant find an NVR for sale without having to buy cameras as well.

Any help appreciated.

Will this work?

Did you look on eBay? Zmodo, Funlux and now the SHO brand are all compatible.