The Pro-Tec website says this helmet can be upgraded with Audio Force Ear Pads. I can't find those for sale anywhere. I really like this helmet, but audio is a must for me. Where/how can I get the earpad upgrade?

Tech Specs:

Material:

[shell] injection molded ABS; [lining] EPS 

Adjustable Vents:

yes, 4 adjustable vents 

Fit Adjustment:

adjustable chin strap 

Recommended Use:

riding 

Manufacturer Warranty:

1 year