I have it, The Ellan Vannin Tragedy, on the second disc of a double vinyl set, The Spinners Collection. Contour record label, ref no PDA 026, "Manufactured and distributed by Pickwick International Inc (GB). Copyright Phonographic Performance Ltd.
Bought it in an antique/junk shop in Sidmouth a few years back: all records £1! Even when I pointed out that it was 2 LPs, they only wanted £1 - and in mint condition!

And yes, the other "Ellan Vannin" song: a friend who has Manx connections sings this at one of our local clubs.