How to get in contact with small/medium sized manufacturers?

Hi everyone,

I am looking to get in contact with garment manufacturers in Bangladesh but considering that i am buying a small bulk of clothing for now, i figured i will need to do business with smaller/medium sized factories. Is there any way to get in contact with them. A phone number, website or even an email address. I plan on visiting Dhaka but would like to have a conversation before hand as well.

Thank you and will appreciate any help.