What you attached is exactly what I'd like, please PM me with whatever chords you found. Hoping to play it this Sunday, so any chords you find would be great.
I'm flattered you think I could do it quickly, but I'm way behind on all kinds of stuff.
If you wrote out the melody, as you sang it, with the correct durations, though, yes, that would take only a few minutes to add some chords, or some optional passing chords or alternate chords with voicings.
IME, the most work is just putting the first marks on the page: regular numbers of bars per line, set up the key signature, maybe put some labels on repeated parts, etc.
By contrast, while I had no idea the piece was in Ab (even though like most people I use that key a lot), there shouldn't be any problem at all for me or anyone here, I suppose, to just play along with some basic chords without preparation.
So if you do the first step, I or no doubt others can easily fill in the rest without any trouble.