Someone could make a pretty penny 3D printing, in a softer plastic (or otherwise replicating, perhaps using one of the softer, more flexible polyurethane casting resins in RTV [Room Temperature-Vulcanizing] rubber molds [the platinum-cure ones are better and longer-lasting than the tin-cure molds]) those RSL shuttlecocks, because:

[1] They are long out of production, and so will eventually become unavailable;
[2] They're the authentic Estes-used ones, and;
[3] Their spiraled ribs did give them some stability-increasing spin, as the seller on eBay wrote (this feature isn't necessary, but it adds to their authenticity as *THE* "official" Estes Birdie shuttlecock.

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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
http://www.lulu.com/content/paperba...an-form/8075185
http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com.
NAR #54895 SR