If you’re looking for door knobs in Perth, Australia, you can try various hardware stores, home improvement centers, or specialized door and hardware suppliers in the area. Here are a few options:

1. Bunnings Warehouse: Bunnings is a well-known home improvement store in Australia, and they have multiple locations in Perth. You can check their door hardware section for a variety of door knobs.
2. Mitre 10: Mitre 10 is another popular hardware store chain in Australia. They often carry a range of door knobs and other hardware items.
3. Local Hardware Stores: Perth has many local hardware stores that may offer a selection of door knobs. You can search online or visit nearby hardware shops in your neighborhood.
4. Specialty Door and Hardware Suppliers: Some businesses specialize in doors and door hardware. These suppliers may have a wider selection of door knobs, including more unique and decorative options. Look for these specialty stores in Perth.
5. Online Retailers: You can also explore online retailers that offer door knobs and hardware. Websites like Bunnings, eBay, and Amazon often have a wide range of options that can be delivered to your location in Perth.

Before making a purchase, make sure to measure your door’s existing hardware to ensure that the new door knobs will fit correctly. Additionally, consider the style and design of the knobs to match your interior decor.