I was given 3 Lorex LBV1521-C cameras. My friend said the DVR was gone. So silly me thought I could use any DVR but found out I need a Lorex DVR. I'm having a hard time finding out what ones would work as I only see a few cheap older units on eBay. One says they need LHV1000 and another talks about any 720P Lorex DVR would work. I tried to email the company but never heard anything back. Does anyone one know what models would work? Trying to see if I can get something cheaply setup.