57/58 wiper arms

Hi Guys

I'm having some problems with the wiper arms on my 57.
In fact they got damaged by the previous owner who didn't understand the way how they should be dismanteld.
So I'm seeking for a good used set of a left and rigth 57/58 Buick wiper arms.
Wiper arms of a 57/58 Cadillac will fit too as they are the same

Thanks

Peter