It looks like Jim Roberts has been shopping again. He reports that River Hill Garden Center in Clarksville, MD, just got in a great assortment of large double-flowered Sinningia speciosa, those plants many know as "Florist's Gloxinias". These do look luscious:
Why are these known as Florist's Gloxinias? Sinningia speciosa used to be called Gloxinia speciosa. For a little more reading, try the Sinningia & Friends website.