After posting above, I found that the newest catalog from Graf & Sons (pages 164-165), has a Saeco two-cavity mould listed for full wadcutters in both .44 and .45 calibers. So, they are in current production...no need for custom builds.
http://www.grafs.com/retail/catalog/...categoryId/452
http://www.grafs.com/retail/catalog/...categoryId/453
Not the heavies you were fantasizing about, but full wadcutters none the less.