Regarding a British Army Alouette II: The XN132 had a plain tail girder without that radar/radio (???) thingy on. Seems there are a few on Ebay (no decals but they can be made) but they all have pig ugly fat girders. Guess 1/72 is a bit small for proper girders. DIY tail and decals seems to be the thing for such a project. Some inspiration here perhaps?
http://www.arcair.com/Gal14/13201-13...-Sousa/00.shtm