It could be an old model, allot of clothing brands change their range over from time to time, you might not find it in current stock. I'm a shooter as well, I was in bushwear the other week and the Harkila stuff is better than anything i have seen anywhere else in the UK.
Try putting Harkila Jacket into Google and check the images section, it might be easier to recognise it from an image than searching loads of websites!!
The things that come to those who wait will be the things left by those who got there first.