Too easy mate ..
Got it from this crowd ..
http://m.ebay.com.au/itm/121083672407?nav=SEARCH
Turned up 3 days after ordering .." including the weekend " .
Came with 3 different sized threaded shafts to suit other vehicles ..
But on unscrewing my original Ariel ...the shaft remained .
Just screwed the stubby new one straight on .
Reception on all channels with the stock radio seems Clearer .."have not tried am stations ..only horse racing on there in tazzy anyway I think "
+ being tazzy .......your never really that far from the broadcaster as is .