This style would give you flexibility if you like the look.

A Linear fixture might allow the installer to run wire to the elec. box at one end of the ceiling plate instead of in the middle, assure the plate is your 20" needed.

You just need a better electrician!

Sorry what is the issue ? Get a good electrician find a light you love made for sloped ceilings and have rewired to give you the cord lenth you need but I need to understand why the electrical is so far from the table I see a pot light very close to that why not feed from that and do an LED fixture simple to do I do not like DR lights thst light the ceiling it makes no sense when the light needs to light the table I for sure do not know where 100' feet comes in . Take a pic from futher bnack showing us the ceiling please Post here in a comment DO NOT start another post .

I was expecting to see wood ceilings but since you have drywall it’s not that hard to move the electrical, even if you have to keep the existing junction box with a blank plate and jump off of it. But yes you need an electrician to lengthen a standard fixture.

Here’s a picture with the west elm Gull pendant installed. Perhaps I need my husband who’s a contractor for to see our new light fixture with fewer bulbs and an ugly swag to call his electrician friend. 😊

@dada139: you may be referring to a speaker in the ceiling that you see

yes, move the box. remove the plastic from the chain too.