This covers batches one and two, there were probably a revised version which included batch three - anyone have it?
I haven't encountered any adverts specific to the type, but they featured in other trade advertisements. The first is a general advert for Met-Camm, the second is for transfer manufacturer Tearnes who probably supplied the numbers and crests the class carried.
Details about the preserved Class 111 vehicle can be found here.
Many of the works photos are courtesy of the Kevin Dowd Collection.