Hello,
If my memory serves me correctly, I recall seeing a couple of Royal Airship Works R100 and R101 badges for sale about 3 or 4 years ago in a Bosleys auction and achieving significant sales prices.
I will have a look if I have the original details in a week or so, as I can reach my records just now.
Interestingly there is a reference to a R100 uniform and badge at
http://www.airshipsonline.com/learn/...R100/Page3.htm
As regards the RNAS airship badge, that's another story. I'm with the majority that's they are fantasy pieces!
Best Wishes