Avensis DAB aerial replacement

[Willss]

I have a 2017 avensis tourer.  Finally managed to figure out that the annoying wind noise at high speeds is the aerial - noise goes when it is removed, who knew it could have had such a simple cause! 

A friendly mechanic swapped it for another Toyota aerial and noise didn't reappear but the reception was poor.  Put another aerial from another Avensis on it, signal returned but so did the noise which is again intolerable!  The current aerial is as supplied from new about 18" long with a wire spiralling up the outside of the 'stick'.  Can anyone recommend an aerial that gets good reception, is not too expensive and which has not caused wind noise issues for them!  I'm sure most would fit but I'm after one which receives a good signal as DAB strength is not great round here.

Thanks!