If you are building a T-notch filter into your HBR the Miller 9003 is available on eBay: https://www.ebay.com/itm/1-PC-9003-JW-MILLER-Adjustable-Wide-Range-Inductor-570-2-80-mH/222610294435?hash=item33d49b86a3%3Ag%3ASGEAAOSwlulbaKoV&_sacat=0&_nkw=Miller+9003&_from=R40&rt=nc&_trksid=m570.l1313 73 Bob, W8RLC