Roland/Rodgers makes one, so does Viscount, and Orla. They have flute and principals at 16 through 2, a mixture, reed and v celeste. The keyboard can be or is split to emulate 2 manuals. The split is settable on some. I picked up an Orla on ebay, 76 keys, digitally sampled organ voices. Has digital effects too. Have connected it to a midipedalboard for a 1 manual organ. Outboard sound system does wonders.