Not sure about the "Cowleys", but the 1951 1500 Morris "Oxford"'s jigs and tools were sold on to India;
The 1951 Morris Oxford was the Series MO model with the side valve 1,500 cc engine; my first ever car. The Hindustan was identical to the 1954 Oxford but so was the 1954 Cowley; it was the engine and fittings that were smaller and cheaper on the Cowley.
About ten years ago the Hindustan was released on the British market. Not a lot of takers, though, even the Sikhs wanted to forget those.