At the risk of being bold, I have a way of making kumquats that will make people that don’t like them change their minds, and people that do like them beg. If you have a friend or neighbor with a tree, please ask if they intend to use all of their crop. In my experience, many people do not even know what they are, much less use them.
Also, an apple tree is at the top of our Co-op wish list. We use the whole apples, and they are a superb source of pectin and mild flavor. Meanwhile, please put your apple cores in a bag in the freezer, so we have our pectin stockpile.