I think I have one from the VXR I stripped, give me a clue what it looks like and I'll rummage through the bits I have in boxes. If its there and will work with his car he's welcome to borrow it until he gets a replacement or his own repaired.
According to max Ellery manual it's a small black plastic box Fitted on or next to the fuse box.(rubbish pic) And should have 17-hi-ps on it. Amongst other things. I'm not always on here. If you could text to 07713633971 that would be great His car is unuseable with this fault.