if you have chinese contact, i would suggest that you buy everything online. they have online platform called taobao.com which sell almost everything you need.
otherwise, AFAIK RS do accept order from individuals as long as their delivery address is within china. around 10 years ago i bought some transformer from them delivered to my apartment (back when i was a student )
if you do not have contact in china, and do not mind pay small fee for a translator and company, you could try googling for a china freelancer specialized for this kind of work.