Yeah, its called the .264 Win Mag, based on the .458Wm case, same case as the .338WM and the 7mm RM...
There were some older model Sako finnbears chambered in .264WM, but not sure if the 75 ever was...
Winchester model 70 stainless/wood in a Left Hand short action 260,7mm-08or 308. Now there is a very unlikely wish. I have had all the other lefties but we always wish for what we can't get.