Note, the CAU reference relates to the fact that these designs are a consequence of the time travel events of the CAU-A universe and therefore are not part of the original time line. This is evidenced by the fact that events are occurring nearly 100 years out of sync from the original time line.
Quoting jt froh
How did you make the wings? I see three connectors, but I don't know what piece they're attached to.
ok, the part is called "plate 1x2 w.03.2 shaft 22.5d" I've checked and it is only available in the extended theme. I also checked "pick a brick" on Lego.com and the brick is not available for order (at least not from spain).