Something the same with PD James' Austen. One needn't expect pastiche, but it sounds odd to me when a housekeeper says 'There's a bed in the adjoining room. I can get it made up with pillows and blankets.' 'Can get' to my ears is modern, and not suitable servant's language. Doing a fast search through Pride and Prejudice suggests that 'get' has a slightly invidious sense:
The business of her life was to get her daughters married
Lady Lucas quieted her fears a little by starting the idea of his being gone to London only to get a large party for the ball
I am always glad to get a young person well placed out
Her ladyship received them civilly, but it was plain that their company was by no means so acceptable as when she could get nobody else
She had seen enough of Bingley's behaviour to Jane to be convinced that she would get him at last.
It doesn't feel at all like the neutral verb we now use it as.