Gary,

You might want to contact James at their USA office. His contact information is on the FEJ website. He has been good in the past about answering questions and sending replacements for problem parts.

My brakes look different than yours. Yours look like they may take a large o-ring to sit in a grove around the circumference of the hub. Mine is an early standard F-16 and is equipped with Airpower wheels & brakes. They are the disc type shown on FEJ's website and the 33mm. brakes shown on Airpower's website.

http://www.flyeaglejet.com/f16%20Accessories.html
http://www.airpowernet.com/twe3/prod...products_id=27

Also here are the Airpower wheel seals if James isn't able to send you some. My main wheels are 76 mm.
http://www.airpowernet.com/twe3/index.php?cPath=12_38

Joe