wiley's watersports right here in south seattle sells just about everything ski related. they also provide components for a number of different bindings and they are a few blocks away from a machine shop that punches out aluminum parts for them and other companies. if anyone can get you hooked up for metal ski parts it would be wiley's.
https://www.wileyski.com/about-us/ -ask for darren (206) 762 -1300