Lynxcat

HI, I am trying to find information about an add on camera for my Lorex LW272 system. I have contacted Lorex three separate times with no luck in receiving an answer to my question. I know the LW272 (LW2710 Series 7"monitoring system) is an old system but it works great for my purposes. I was hoping that I could locate one of the original cameras or a newer one that would be compatible with the monitor of the system. Thank you in advance for any assistance with this.