The best prices seem to be from a company called Sciessport-Buinder who are based in Mottingen. I don't think they keep most of the Feinwerkbau range in stock but get them in a few days. The best way to purchase from them is using the internet with payment using PayPal. The delivery costs to the UK is around £24.00 and my own rifle only took a couple of days to arrive after they sent me an email tell me it had been dispatched.
As far as taking a rifle on an aircraft is concerned you would have to contact the particular company. It would have to be carried in the hold and declare as a firearm at check-in.