Sorry to hear that, Ross.
Sounds to me like an FAA 337 won't work.
How about using the barter system with someone who has an original set and would like to upgrade?
Jim

On Tuesday, May 19, 2015 at 9:11:23 PM UTC-7, Ross wrote:

Hi Jim,

If only it were that easy here.
The only certified winglet is the std winglet. I would happily change if I was legally allowed to do it.
Ross