Looking for a replacement dvd burner for an ILO recorder

I have an ILO DVDRHD04 DVD recorder/player with a hard drive. The DVD burner does not recognize blank DVDs or DVDs it previously recorded. It does however recognize commercial DVDs. From all the threads I’ve read it appears that the only solution I have is to replace the DVD drive. I’m fairly sure I can figure out how to remove and replace the unit, but I was wondering if anyone could tell me what drive is a good replacement for the original? ron