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Is plenty of good data to support that,Same with mercury.At any rate,any metal will work as a wedge.

Get a pound of cerrobend off the bay or a gunsmithing supply company (melts at 158 degs) make an epoxy or even a plaster of paris mold,real simple to do using just a hotplate or on top of the stove.

Traditionally lead is used on alot of Vintage stuff,Brass comes to mind,something thats easy to work with.
Is a an ebay seller that sells brass wedges,spendy but good quality,have silver plated a...