Hi,
I bought for my Sebart MythoS Pro spare nylon wing bolts (thumb) as a Hangar 9 spare part:

Hangar 9 3.1m Sukhoi SU-26MM Wing Bolts (6) HAN106022

http://www.hangar-9.com/Products/Def...odID=HAN106022


It same thread as Wind S Pro, 1/4" diameter, 20 threads-per-inch (1/4"-20).

I bought my spare wing bolts from UK (but I'm sure You can find it in US also):
http://www.revmod.co.uk/Hangar-9-3.1...HAN106022.html

They are longer then original so You just shorten it to same length as original Sebart bolts (= 1 inch long).

/Bo