an import agent is someone who manages importation and logistics, such as a freight forwarder.
As for your plan, it could work. For larger (retail) companies, you will find it difficult unless you have a USP. They already have their own network and people on the ground (as well as local offices) and you would need to offer something very different, be it prices, ranges, designs etc, to get a foot in the door.
Your biggest opportunity would probably be in mid-size companies, who have little or no experience in direct sourcing.
As for approaching brands, the same applies, however, as their core business is developing products, there maybe less chance!
Good luck in your venture!
__________________
Dragons Den advice, without the cost .
Experienced in: Product & Brand Development, Marketing & PR, Small Business Development