So I did a quick Google, and the individual AIDS Quilt Panels are in the custody of the National AIDS Memorial, warehoused in San Leandro CA.
But a bunch of letters, photos, and documents from the panel makers are part of the American Folklife Center at the Library of Congress.
Is there a way that individuals can make copies of that archive? The current administration, and the Heritage Foundation, are gleefully rewriting American history. We need to save shit.