Truth casement replacement hardware

Hello,
I'm working with a homeowner with casement windows built with truth hardware that has rusted out from being in a coastal environment. I would like to order replacement parts and was looking for parts that would stand up the best in a coastal environment. Attached photos show parts with the measurements that match the parts on the window. I would like to order a set of right and left hand parts and want to make sure I do not miss any parts I will need to replace all the window hardware. Thank you in advance.