The links are bad, they're aren't apps. Looks like they're were two sets of 21" cars then a 21" separate RPO. I don't see a full dome on the list though.
http://www.legacykline.com/app..._name=Great+Northern
http://www.legacykline.com/app...mp;p_oem_sku=K-4633C
http://www.legacykline.com/app...mp;p_oem_sku=K-4633B
http://www.legacykline.com/app...mp;p_oem_sku=K-25332
http://www.legacykline.com/app..._oem_sku=K4633-40038