Welcome to Bunnings Workshop. The item your after is currently not stocked by Bunnings and is available at third party suppliers. I suggested it as a diy project and make your own open channel spoon drains. They are easy enough to make and you can custom make your own!
I am a Bunnings team member. Any opinions or recommendations shared here are my own and do not necessarily represent those of Bunnings. Please visit the Bunnings website if you need assistance from the Bunnings customer service team.