DS6.0 and DS5.5 keyboards to fit a Yamaha C6/C7 are on display at the Cunningham Piano Company store in Philadelphia: https://www.cunninghampiano.com/
New Hailun HU1P upright pianos with DS6.0 and DS5.5 keyboards are now available from the following Hailun dealers in the USA:
Please contact Vienna International for further information: https://hailun-pianos.com/mysizekeys/
A DS6.0 keyboard has been installed into a Yamaha C7 in A loja de Pianos, Sao Paolo, Brazil. https://alojadepianos.com.br/