The House of the Dead 4 on PS3

System: PlayStation 3

I'm not certain if this was asked yet; but I was looking around to see if I can find The House of the Dead 4 on PS3 on here, but the only thing close I could find was THOTD: Overkill. I've been struggling to find this game (THOTD4) and I don't want to have to resort to dubious sources to get it. If anyone has the ROM for this game, please let me know.

Thanks in advance,

Fandel