those little plastic thingies come with the bike not the box. most mechanics after placing the bike in the stand either pull it off, or take the pedal wrench and POP it off across the room. just ask them for a few.
or...
http://biketoolsetc.com/index.cgi?id..._id=FP-SHIPKIT
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk