I guess you could cobble up something but remember that it has to take up to say 15PSI without leaking.
I bought the factory one thinking it would fit but it didn't because of the dimensions of the reservoir.
I had forgotten that it needed the cone and tried it without, and fluid ****ed everywhere.
But it is feasible to make one if you can get a stopper the correct shape.
I am not sure about the smoothness of the inside of the spout is as there is a filter basket inside which I was able to leave in place. You would probably have to have a stopper with a similar slope to the Motive power one which may be difficult to find.
Regards Philip A
PS The Motive adaptor kit is USD27.95 so unless the postage is excessive, it is hardly worth stuffing around on something that may not hold pressure.



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