Follow Paulster2s comment is to get a perfect result. But prior to going to a body shop or going to the scrapyard, you might try this:

As the dent looks really clean to me, another possibility might be to remove the inner door trims and push against the dent from the inside. You might be able to reach the dent from the inside without too much parts that are in the way. It can be dented out again with the right amount of pressure and just with your bare hands. Scrape off the damaged paint and repaint it yourself. This outdenting costs half an our work, but might save a few bucks and a search for an equal door.

Follow Paulster2's comment is to get a perfect result. But prior to going to a body shop or going to the scrapyard, you might try this:

As the dent looks really clean to me, another possibility might be to remove the inner door trims and push against the dent from the inside. You might be able to reach the dent from the inside without too much parts that are in the way. It can be dented out again with the right amount of pressure and just with your bare hands. Scrape off the damaged paint and repaint it yourself. This out-denting costs half an hour work, but might save a few bucks and a search for an equal door.