I'm sorry we do not have suppliers carrying the blank license plates and metal bottle tops you're looking for. We found this supplier outside of the directory though:
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Direct link:
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As this supplier are not part of the directory, we recommend that you make use of a credit card or PayPal account if you wish to purchase from them to ensure a safe business transaction.
As for hair brushes, try these suppliers:
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To find specific products on their sites, I recommend using the search function or browse through their categories.
Make sure you contact them directly in order to get their true wholesale pricing which is always better than you will see on their site. When doing this, provide them with the quantity you are ideally looking for, where you want them shipped to, and how often you plan on purchasing - this helps gets the best possible price.