I needed a funnel so I designed one in fusion 360 and printed it out on my Anet A8.
These are links to the companies mentioned. I have no affiliation with them I just use their products.
http://www.banggood.com
https://www.autodesk.com/products/fus...
and
the STL can be found at thingeverse https://www.thingiverse.com/thing:306...