No I'm not aware of that product.
I do not think a tandem trike is a good idea. Basically, it's a geometry issue. The single trikes were built the rear width to get them through a house door jamb. When you combine that "relatively narrow" width the long length of a tandem, it is not able to hold up two riders. The normal single rider tribike's were marginal on turn over stability especially when you ride over a curb at an angle. This is the reason the CPSC recalled all of the motorsport's ATC's (three wheeled cycles) (poor stability) and the manufacturers developed what we know today as ATV's four wheeled all terrain vehicles.
My daughter has run marathons for years, including the Boston Marathon. She has developed a neurological balance issue and now has to ride a three wheeled bicycle. She rides with the Challenged Athletes group and rides her trike each year from San Francisco to San Diego. She has been through all of the three wheeled options. She tried a carbon fiber trike (one wheel in front, two in back) and she was not stable enough to ride the bike safely at speed. She now rides a three wheel recumbent with two wheels in front, and one in the rear. She is trying to get her current three wheel recumbent accepted as a legal bike handicap option for the Paris Para Olympics. Sorry for all of the side story, but we are proud of her for not giving up her racing in spite of her new challenge.
John