Kinro windows

Hello, my spiral balances measure .385 in diameter and have red tips. The ones I've measured so far are 26" and 24" in length. I just bought the 1998 Skyline Brookstone double wide and all spiral balancers appear to be failed which caused the pivot pins to break on every window but one. I found the correct pivot pins from another supplier but I need the spiral balancers from you guys. I see only 5/8" balancers, do you have 3/8" balancers available?

I found the 3/8" diameter balances (series 900) and have a few in my cart. I will measure the rest of the windows tomorrow and submit the order. Is there any sort of preventive maintenance that I can do to extend the life? The ones I've inspected are lubricated and not corroded in any way but they buckle when I try to slide the shoe.