Whats going wrong with Superbuy? I just put the link into the product finder and It added to my cart fine.
I just buy directly through taobao/tmall. Google chromes inbuilt translator is good enough to muddle your way through. Heres a guide.
https://www.howtotao.com/how-to-register-a-taobao-account/ and here reddit.com/r/FashionReps/comments/4yr51a/guide_to_taobao_direct_buying_without_an_agent/
The most important thing to remember is you pay to ship items to a Taobao warehouse first. Then they will calculate international shipping rates. You can select from a number of different options.