Hi Gilles
Sorry I only have just seen your new post.
The first two pictures above do show the "normal" engine mount setup that does indeed use the same mounts as the 200/2500 saloons.
The diagram 4.102 shows a prototype pre-production setup, this setup also included a small damper fitted between the rear of the engine and the bulkhead, this was not used in production on UK models.
The factory parts book does list a different engine mounting setup using a different front engine plate, and the rear damper. but it lists this as being for "special orders" The rubber mount associated with this setup is different to the usual one, I've done quick google search and it may be the same as the Morris Marina 1800/Ital engine mount.
Does your car have the damper at the rear of the engine? I've only seen this fitted to French cars for some reason, maybe they also use the differing front mount setup as well.