720 fuel line leak

Hey guys,

Anyone know what the correct fitting part number is supposed to be circled below? I've got a pretty decent leak and I'm guessing what's on here was the handy work of my late grandpa haha.
 
Originally, it had a steel line with "gland" fittings silver soldered to both ends, and an elbow at the engine block end (D417R) to match the "gland" fittings and the same elbow at the filter end.

If you want to put it back to original, the elbows are still available from DEERE, and if you GOOGLE the part number for the line, AR21894R several sources will come up.

<img src - "https://i.imgur.com/EXJUx6R.jpg">

Or, you can make a "correct" replacement line by silver soldering "glands" E2150R to a length of 5/16" steel brake line and installing 2 "nuts", A2069R. The glands and nuts are quite pricey at DEERE, but there are aftermarket sources (GOOGLE the numbers).

On the other hand, if originality isn't important, the copper line and compression fittings should be able to be sealed up, it may take a new brass "ferrule" any auto parts store and likely the plumbing dept. in a hdwe or "home improvement" store should have those.
 
Image of "gland" and "nut" didn't show up, tying again:

<img src = "https://i.imgur.com/oXtX7Fo.jpg">
 

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