The parts in back-order status can be special ordered from the manufacturers
after payment received, the expected time frame is based on our past
experience, and it may take a longer time when there is unusual delay
from the factory or courier, we are not responsible for such unexpected
delay but will inform you the status when such delay occur. (If there
is no time frame given on the part list page, then the ETA will be
given at the time we confirme your order in the order system)