Hi Steve,
Just google Rover SE2 and you'll see what model it is. I brought my reservior from Dave at Rovacentre for about $30 in good condition. He was quite helpfull and posts it anywhere. Ph 03 97822630
Ask for the rubbers too were the SE2 reservoir sits in the SE2 master cylinder
It looks like it holds more fluid and is better than having to modify brackets etc.
The Landrover reservoir doesn't hit the bonnet, it's very close but the angle it's on is too much. The SE2 one is better as it's angled to suit.
The botton is std Capri MS, the top is the Landrover MS with the SE2 reservoir