Now I found a store autemashop.com here in Sweden selling BD139/140-16 (ST) and BC550/560C (ON Semi) at ebay:
The prices are really affordable and they will ship to Europe and US.
I just bought 40 pcs BD1xx-16 and 100 pcs BC5x0C.
And I also have to say, when I upgraded my first Lovely Cube with RK27 volume pot, some polystyrenes and "snubbers" (0,1uF caps) to bypass the rectifier diods BYV27, the sound was getting much quiter.
So now I´m just waiting to start building my two new amp´s, just a few things left to get.