Ok, after too many hours scouring t'internet (I need to get out more) I've found out that they
do exist. There is a suitable FLIR pod in the resin parts of Hasegawa's HH-60 Rescue Hawk - top sprue 2nd bit from the right:

There is also a 1/72 white metal Nitesun available from Whirlybirds as part of its Alouette 3 upgrade kit (bottom left):

I'm now in a dilemma. Do I spend out for a complete Rescue Hawk kit and the Alouette 3 upgrade, just to use one small piece from each? I'd really like to build a Gazelle in the same configuration I flew in Northern Ireland, but I may prove to be very expensive - unless any forum members have those bits hidden in their stashes that they wouldn't mind sacrificing.
I don't want to build just the standard Aifrix Gazelle, and I don't necessarily want to scratch build both of the bits I would need. The other alternative is to do the Gazelle but to do one of the more exotic paint schemes that I flew. I am particularly drawn to the paint scheme that the Army Air Corps used in Canada at the British Army Training Unit Suffield (BATUS):

I'm not turning this into a formal poll, but would be interested to know what other forum members think. I've already got a tin of dayglo orange paint . . .
F_M