Did they say the dummy was the reason he wasn't sleeping?

My only suggestion is to go 'cold turkey', a 9 week old won't understand when you tell him it's lost or the fairy took it. The first couple of nights could be interesting though. I hope you find something that works.

DD was 3 when we got rid of hers, she kept losing them so I'd hide them as I found them. We just told her they were lost. The first couple of nights were pretty bad for her but she got used to it.