I'm missing a few pieces in my XingBao set I just finished the second floor of XingBao's 5052 piece Maritime Museum.

And while I'm pretty impressed with the overall quality of the building, I thusfar am missing 4 parts.

Is there a way I can obtain substitutes from XingBao for the missing parts?



Note

The set I'm refering to is NOT a clone of a Lego product or fan-built MOC but an original MOC created by XingBao's YiyiToys design team. Unlike Lepin, which is infamous in the Lego community for blatantly cloning Lego sets, XingBao's sets are all original designs and not Lego clones.
Xingbao reproduces standard LEGO elements for their models, so it should be much easier to replace the missing parts with LEGO pieces, then trying to contact Xingbao. If you are not familiar with the LEGO equivalent of the missing parts, you can post a picture here, and the community here should be able to identify them for you.