Just spoke to a friend who made a different suggestion. The way he did it:
Lay out some tape tacky side up, or strips overlapping each other. If you need to, press the tape onto your bench and then pull it off a few times to reduce the adhesion as you will need to be able to get the frame off later without breaking it.
Using a compass, draw a circle larger than you need on the tape. Mark out the six sections on the circumference like I suggested earlier and then draw lines from one mark through the centre to the other side. The lines will be your guide to laying the blades
Punch out a small disc from .10 styrene that will be the centre hub. If you do not have a punch set, try a pencil eraser (the soft white type)as a base, lay the styrene on it, and use an old drill bit turned upside down to knock out a small disc. You may need a few attempts this way.
Use an exacto blade or small drill bit to indent the centre of the disc where it will sit on the aerial. Put this disc on the centre of the circle you drew with the indent down.
Using .10 thou x .20 thou styrene strips cut out the 6 lengths for the fan and point the end a bit. Place the point over the disc on the tape and line the 'fan blades' along the line that radiates out from the centre. Add glue. Repeat for all 6 fan blades. Let that set.
When dry, gently ease the fan blade ends upwards off the tape. Press down on the centre disc with what you used to punch the disc, and then ease each blade upwards from the edge of the punch to form the antennae. slip a blade under the centre disc to pop off the assembly from the tape.
Using wire for the aerial, glue that into the depression in the disc.
Good luck if you decide to try it.