I just did some searching for you and would guess these are no longer imported and were never very popular when they were. if you look long enough to might eventually find one.

firing a 338 win mag from a 6 pound gun isn't what I would consider a good idea. I found a youtube video of some guys shooting the gun and it looked comical. if you insist on a big cartridge in a small gun they still offer the 300 win mag in the Tikka lite.

-matt

Here in Canada, the only way a 338 win mag is available in the T3 Laminated stainless and the camo stainless version.

http://www.cabelas.ca/product/5911/tikka-t3-laminated-stainless-bolt-action-rifle

http://www.cabelas.ca/product/5909/tikka-t3-camo-stainless-bolt-action-rifle

Not available in the T3 lite version at all.