You can get some cool free broom designs from events such as the christmas event and the halloween event. In the past, these are the Christmas Tree Broom:
and the Vacuum broom (aka, Hocus Pocus "broom")
(sorry for the awful screenshots, its hard to take screenies of yourself xD)
These are often available during events by exchanging said events tokens for rewards (and iirc, they were still available during last years events so may also be available this year, or perhaps we will receive new wand/broom appearances in future events) so yea, maybe you do have to put some work in, but I think these special appearances are fun, and ofc, we may get more in the future.
Maybe these aren't exactly what you're going for though, but I do have to admit, a magical helicopter might be too big (I already think the ford anglia appearance in the store is huge lol) plus..I personally just don't know if they could do it as it would also need to have animated parts for the rotors etc, but you never know. They have animated wings and blinking eyes as "hats" so...
Anyway, you have given me ideas for possible future brooms I'd like to maybe see in events xD