Update: I think I need to find the expression for the hex value a7c

That's probably line feed (0xA) and vertical line (0x7C), so the expression is "\n|". Also note that

"\R" matches anything that can be considered a newline under Unicode rules. It can match a multi-character sequence. It cannot be used inside a bracketed character class

That might make it easier for you to deal with various newlines (it matches "\n", "\r\n", "\r", among other things).