check other bicycle shops (let your fingers do the walking)... if you still have problems, i'll contack my lbs (where i got my bikeE CT) and send you link to their supplier.
my flags are safety orange with white 4.5 ft fiberglass poles. mounting device goes from fender or kick-stand mount (above rear axil) and pole is supported on the upper sweet-seat tube.
try getting fairing and fenders next, a real attention grabber here in s nj!