do you have these or something compatible
Welcome to the Bunnings Workshop community @Macheke65. It is great to have you with us, and many thanks for your question.
Are you referring to the central outlet/flush valve in your cistern? If so, we do sell a range of replacement outlet valves, but you'll need to identify the type and model you currently have and compare it with the options available in-store to ensure compatibility.
It's also worth noting that the problem might not require the entire valve to be replaced. Depending on the valve, a plumber may be able to replace the seal or another serviceable component to resolve the issue.
Plumbing regulations vary between states and territories, and removing or replacing a cistern outlet valve can involve regulated plumbing work. If replacement requires dismantling or disconnecting the cistern's plumbing, I'd recommend engaging a licensed plumber to assess and complete the work.
Please let me know if you have any questions.
Mitchell