Oh boy I forgot about this, it either wasn’t what they advertised or didn’t work.
I have yet to find a modern source that’s very close to the ones they used. Notably the first section of antenna is straight before starting to taper.
Now, the blades on set varied a lot, thick, thin, short, tall, etc. so many will work just fine. Glomex 1-2m are pretty good, though thick at the bottom, some 8 footers that were made in the past 20 or 30 years can be cut down to the right size and are very good too, a bit less tapered
So really the details I look for are matching base measurements and some sort of notable taper. Also material, you’ll want the fiberglass with white UV paint, not the ones that are spiral wrapped or have PVC radomes (Shakespeare seems to make both of these)
In all my blood sweat and tears I’ve found many can work, for the “look” you’re going for but the ability to match aluminum stock measurements is important without a full lathe, and if it’s for a motorized stunt, it has to be true.
I recently found my first vintage CX-4 and the top 1/5 is crooked. Just the nature of the fiberglass so no fixing that