I know. I emailed them about when they will be back in stock and aparently not until the first of March this year. I'll probably have to look elsewhere in that case.
Thanks anyway.
You could order some sample from National themselves. Cost a little but i got a a few tubes of Lm3875, Lm4780 and Lm3886 that way. Didnt cost the earth and i have enough to build a couple of home cinema setups with what i got!