Well thanks guys....some of your advice is positively scary.....talked to one of the local surfers this morning that has always something stuck in his earholes. Said I'd wadded up some electrical tape & chucked that in the hole.
His low tech ear protection solution is bostik blu tack.....tried it this morning seemed to work good.
Could hardly hear what people were saying when I dropped in on them or lurked out the back & took the best set waves though

On the other hand Towball was also lurking out the back at makorori point this morning pretending he couldn't hear the names people were calling him & he didn't even have the blu tack excuse lol