shop in 街市 have parts for bikes. If he don't have it you can ask him to order it for you. The distributor have most of the parts in stock. We took a few incar (or I should call it inbike, LOL) and driver stand video. Will upload it as soon as I got it from my friend.
standard is very good already. You can ask 友X to order it for you as I don't think the distributor have it in stock. I waited 2 months for mine.... But it is worth it as it is very good out of the box. The ZH 1/5 is very good too as it is more stable compare to the NF pro.