Where to buy Italian vintage clothing in bulk?

Hi everyone!!!
I've recently become fascinated with sourcing Italian vintage clothing and have been thinking about the possibility of buying in bulk. I would like to find trusted sources where I can purchase quality vintage clothing from Italy.
If anyone has experience buying in bulk, I would appreciate tips and recommendations! What companies or online platforms can you recommend? Maybe someone has already worked with certain suppliers and can share his/her opinion about quality and prices? What to pay attention to when buying, are there any peculiarities in customs procedures if ordering from abroad?