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Occasionally you can find sets of the rods and washers on Ebay for not too bad prices.

I just did a quick look at when Antoni Tadross was in the razor buisiness, and if those scales are origional to the razor, they are most likely a high tin alloy. During that time period, aluminum was...

It could be that some older aluminum alloys had high tin or nickel content.

You could keep it all metal and make a wedge out of brass. Just my 2 cents.