A few years ago flavored vinegars where everywhere and now they are almost imposable to fine. Have not tried using other fruits yet but am hoping to try using figs as fig vinegar is great in marinades. Found this on a blog called A Family Feast.
Place strawberries and sugar into a blender or small food processor. Pulse on high until strawberries and sugar are pulverized (add a bit of the vinegar if necessary). Add the vinegar and blend until completely mixed.
Allow the strawberry-vinegar mixture to sit in the blender for one hour (this will allow the strawberry flavor to infuse the vinegar).
After the hour is up, pour the mixture through a fine sieve lined with a piece of cheesecloth. Allow to drain completely, using a spoon to push the vinegar through the cheesecloth if necessary.
This vinegar may be kept in the refrigerator for up to one week.