There is a book published on the history of Army Aviation in Ulster that I have on my bookshelf. It doesn't have a complete list of all Scout airframes used in the North but the Scouts mentioned in the book include;
XW798
XT623
XT638
XV129
XV136
XZ134
There is probably a list of all Falkland Scouts around somewhere so maybe some of these helicopters served in the North and the South! Good luck with the model.
500 Fan