yes, you can also get it from them, special want get the motor and battery in one time if you are not in EU, because our shipping cost of motor and battery is higher.
front fork 150-160mm, tapered
Disc 180mm, or 203mm with adapter,
rear shock 190*51 standard mount with , if you use the one size 185*55mm, need you buy the bolt to fix it, our bolt fit fro 190*51mm standard,
your groupset is ok