Greetings, all!

Lately I've been taken by the look of the caubeen, traditionally headgear of Irish military units (UK, RoI, C). I really like that it is close to the bonnet/tam and beret. It is the high crest and hackle that really catches my eye.
Which vendors do the Rabble recommend? More importantly, are there any I should avoid? If it has any bearing, I like the "rifle" green.
As an American without any ties to the above militaries (US only), is there a color of hackle that is more appropriate? I am not associated with any organizations which wear the caubeen.
Thanks!