FWIW, mine is called "the GATS jar". It's one of those bulky ones with a fine mesh screen in it. If the screen is wet with water, it only allows water through, not fuel. If the screen is wet with fuel, it only allows fuel through, not water. And in all cases it filters out small particles, so after a while you need to undo the lid and wash the whole thing out. The top bit can be reversed so that it's adaptable to both Piper and Cessna-type fuel drains.
It's not an address yet, but if you google on the name you might find some place to buy it.