Soz, didn't reply because I'm no expert, but I'll do my best.
Not sure who sells them - I was looking to buy one a few months back, but they were silly money due to the exchange rate. I only found a couple of places who had them in. Google is your friend.
They are pretty accurate and well-made, but can be greatly improved on that score by fitting a BGS hop rubber. viewtopic.php?f=45&t=4911&start=0
FPS very much depends on the temperature. In the summer heat (lol) 134a will get you in the high 400s; in the winter you'll need green gas.
The so-called "export" version is not restricted at all. The restricted ones can be de-restricted by removing the restricting bits. 
You've got nothing to ein, zwei, drei, vier
hi, im just getting into ww2 airsoft and am looking at getting a tanaka k98k, ive found them here if this is any help ... [link]http://www.fire-support.co.uk/product-info.php?id=1333[/link]
only a few more months and ill be able to afford one! cant wait 
hope this helps..
karl weller
tanaka k98 you wont regret buying one but your oppersition will 
theres nowt so Permanent as temporary
