I have not heard of any fire blight resistant quinces. I have about 160 trees mostly Portugal and Pineapple. I also have some cultivars I grafted to some seedings that came from the USDA germplasm repository in Corvallis, Oregon. Those include Seker Gevrek (from Turkey), Limon, and Krimskaya which was brought in as seed from I believe Azerbaijan.
I am told by the Quince curator that quince come fairly true to type from seed since they are self pollinating.
