Thanks guys,
Problem solved.
Before driving to Bunnings in Bendigo I decided to check with the local hardware place here in Kyneton, and for the first time ever he had some of what I wanted!
1/4" x 1/2" x .035, pack of 3 for $4.10
Picture attached in case anyone else is looking for similar item.
$10 of fuel saved!
Cheers
Chris