This Zonatum I got from Jeff @ Big Fish Aquatics, he ordered it for me through SeaGrest farms. But I believe they got it from Gage @ cichlidconnection.com. Gage is where I usually order my unusual fish from. Ive gotten my female Loisellei, female Grammode, Nurasatti, Rhytisma, Robertsoni, Nicarguensis, Sieboldii, all from him. He has 2 different types of Zonatums, found in different lakes. Each one looks a bit different. I am going to place another order with him soon too, and am going to order some more Zonatum.
Im looking at his list now and he has Hartwegi available from 1.5" @$3 to 9" @$70.
His prices are great and his shipping is reasonable.