These require the Commer bell housing, input shaft and gear selector swapping over to fit but several have done so
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.co.uk/ulk/itm/173553829556
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.co.uk/ulk/itm/173553829556