Find and Replace a stubborn Unicode glyph

OK, I caused myself this mess and can’t figure out how to fix it. I wanted to replace all the smart quotes after numbers to be a straight quote. My fonts don’t have a proper prime character and I can live with the straight quote.

I don’t know what I am doing with GREP, but fond a script and tested it on a few and it seemed to do what I wanted, so ran it against every chapter in a book.

Here is my GREP:
Find:
(?<=\d)”
Change:
~”

I thought it worked fine but in proofing have found an odd character after some numbers. It is an IJ ligature, unicode #0132

I think, easy enough, I will just use the unicode number to find that glyph and replace it.

Find:
\x{0132}

I am looking at one on my screen, but the Find/Change finds nothing. Maybe my code it wrong? I test with \x{0041} and find capital A, test with \x{0042} and find a capital B. Code is working but not finding the glyph I want to get rid of.

1. Why did I get these glyphs?
2. Why doesn’t the Find/Change work to fix it?
3. How can I get rid of them short of eyes on proofing?