Okay so I have a black Burton Freestyle binding and the cushioning or whatever its called on my high back is wearing a little bit. I'm not sure If you can replace it without getting a whole new high back. If I can what is the part called or where do I get them

Hi! I'm new on the forum, been snowboarding for about 20 years but haven't been in the past 4 or 5 years. Anyhow, I was *so* excited when I bought Flow bindings this year (Flow Amp 5, I think a few years old), but the right high back won't tighten enough. I turned the tension wheel all the way...