You can make your own vinegar at home, but this will likely involve obtaining ingredients that aren’t so easy to get hold of, that you will have to order online.
This is commonly done by adding a culture called Mother of Vinegar to fermented fruit juice.
Making fruit vinegar however is a little easier. All you need is a pound of fresh fruit or fruit scraps cut up really small, a third of a cup of sugar, and half a cup of live unpasteurized vinegar. (Examples of live unpasteurized vinegar include red wine vinegar or apple cider vinegar.)
But please bear in mind that the recipe takes weeks or months to fully convert the flavors into a nice fruit vinegar. So it’s not the best option if you’re in a rush, and is only worth attempting if you have the patience for it.