Where do I find Chinese or asian wholesale building equipment?

Hi I'm looking for foreign made fence panels that are made in china to replace existing ones I have. The fence panels are wpc and not a standard thickness found in the usa. I want to ideally visit several Chinese warehouses in SGV or SFV etc to find the closest match. your help is appreciated and if your recommendation leads to success I will send you $100.

So please give me your best recommendation?!