Neck size Austrians count in Centimetres!
I think, 17 is a special military sizing, 108 the civil size.
On the German market I only found original Austrian army woolen jumpers.
In the following link you find the price in € for the original new one.
Why don't you write them an e-mail and ask them?
Bundesheer Alpinpullover, Feldpullover schwer
army-warehouse.com