the fuel line contains a check valve, preventing fuel loss when removed... trust me, I did mine just before the national rally this year, and using a BIG funnel, open the cap, and invert the tank over the funnel to remove the fuel.. dump it into your car.
then, when done lay the inverted tank on it's side, and pull the pump, and do the filter... It's very easy.
you don't need to "order one", they sell them at pretty much every Kaw dealership, it's used on about every fuel injected machine Kaw makes.. they are always on the shelf...
49019-0013... should be in stock at most Kaw ATV dealerships..
go over to the COG site, there are a lot of directions for the job there...