They offer costumes for different themes, including historical

I can provide you with some popular and reputable costume sellers in Australia. However, please note that the popularity and quality of sellers can change over time, so it's a good idea to check recent reviews and ratings to make an informed decision. Here are some well-known costume sellers in Australia:

1. **CostumeBox** (Online):
   - CostumeBox is one of Australia's largest online costume retailers. They offer a wide range of costumes for various occasions, including Halloween, cosplay, and themed parties. They also provide accessories and decorations.

2. **Heaven Costumes** (Online):
   - Heaven Costumes is an Australian online costume store known for its best costumes seller in Australia extensive selection of costumes, wigs, and accessories. They offer costumes for Halloween, cosplay, and other events.

3. **Costume Direct** (Online):
   - Costume Direct is an online costume store with a diverse range of costumes for adults and children. They offer costumes for different themes, including historical, fantasy, and pop culture.

4. **The Costume Shop** (Online):
   - The Costume Shop is an online store offering a variety of costumes, masks, and accessories. They cater to different occasions, including Halloween, fancy dress parties, and theatrical performances.

5. **Spotlight** (Brick-and-Mortar):
   - Spotlight is a popular Australian retailer with physical stores across the country. They offer a range of fabrics, sewing supplies, and crafting materials, making it a great option for DIY costume enthusiasts.

6. **Kmart** (Brick-and-Mortar and Online):
   - Kmart Australia often carries a selection of costumes, especially during the Halloween season. You can find affordable costume options in their stores or on their website.

7. **Costumes.com.au** (Online):
   - Costumes.com.au is an Australian online costume store with a wide variety of costume options for all ages. They offer costumes for Halloween, parties, and cosplay.

8. **Etsy** (Online):
   - Etsy is an online marketplace where you can find handmade and unique costume pieces, accessories, and props from independent Australian sellers.

9. **Local Party and Costume Stores** (Brick-and-Mortar):
   - Many cities and towns in Australia have local party supply and costume shops that offer a range of costumes and accessories. These stores are particularly active during the Halloween season.

10. **eBay Australia** (Online):
    - eBay is a platform where you can find both new and used costumes, as well as accessories, from various sellers across Australia.

When choosing a costume seller, consider factors such as your budget, the specific costume or theme you're looking for, and your location. Additionally, read reviews and check shipping policies to ensure a smooth buying experience. Keep in mind that the availability and popularity of sellers may change, so it's a good idea to verify current information.