There were no other Amtrak dome cars offered by GGD other than the 3/4 SP domes and the great dome. Up until the Amfleet and Viewliner cars, GGD Amtrak cars are very rare and done in small quantities with the first cars being the 4-4-2 and 10-6 PS Sleepers of 2012. However, that could change in the future should a passenger set be offered that had dome cars that lasted into the Amtrak era. Amtrak has certainly gained popularity in the last 10 years.