Spacer for between anti magnetic cover and caseback

[tframo]

Hi guys.   My iwc makes a slight rattle.   It's the antimagnetic movement cover tapping against he caseback 

I believe there should be a spring washer or spacer between them. 

 

Anyone know now where I can find one to fit?

 

thanks for the help 

[tframo]

Bump 

[SSTEEL]

I will check my stock, but failing that, use a suitable sized crystal gasket as a temporary solution.

[tframo]

I will check my stock, but failing that, use a suitable sized crystal gasket as a temporary solution.

thanks!   I will try the crystal gasket trick.