I just don't see why one could go get a piece of fuel safe plastic pipe the same size diameter as the funnel end that goes into the neck.....get yourself some fuel safe hose along with some hose clamps and adapt it to yer gas cans....should work if you've got the gas cans with the independent vent...

 

the only issue that may occur is that the evap systems are different also.....the vented cap might cause a code cause its not venting at the same rate as the easy fill.....

 

buy a metal gas can with the long funnel

http://www.infobarrel.com/Eagle_5_Gallon_Metal_Gas_Cans