If you look in one of the "How to Restore Your Model A" there is a tool my dad sent in. It's fairly simple to make but he just listed the items and didn't put any pictures in it. I don't think it got a whole lot of attention, but is a great tool and doesn't damage the filler tube. I have his listing and also have two of them, which I plan to make a few up so I can make them available. I wish he'd put a picture of it as a picture is worth letting everyone see what it really looks like and works. It's like a dent puller on a slide and it fits around the filler tube and you just give it a couple of pulls and it comes right out with no damage. Private message me and I will look up the details and send some pictures.
MrBruce