For the information of those looking for Electoral Rolls - Here is the response I received and I thought it useful information for all.
Unfortunately survival of Electoral Rolls for this period is far from complete, we hold the following:

1910-1914, 1919, 1950 to 1970 some small gaps in early 1950s, no copies between 1919 and 1949 are known to survive.
None of these are available online and there are currently no plans to make them so.
if you need a search conducted I would suggest you approach one of the researchers listed on our leaflet Family History Sources.
Chief Librarian
Manx National Heritage

Cheers,
Robyn
Australia