Replacement aerial

[Paul J]

My son has a 2016 Corsa SRI which has intermittent DAB reception. Starting with the easier fixes first and have tried and failed to find a replacement aerial. All the ones I've tried have either too large or too small threads. Can anyone suggest where to look for the right size replacement? 

[Vauxhall Owners Club]

Have you looked at the ones in Halfords?

I'm sure they have different size connectors in the range

[Paul J]

Hi. I have and tried two different ones. For some reason the OEM one on a SRI seems between the diameters of the various threads!