douwe egberts cafetiere coffee

[Honu]

It has become increasingly difficult to find douwe egberts cafetiere coffee in the shops. Online it comes in 1kg bags which would probably lose freshness the amount I drink it.

(a) do you know anywhere I can buy it in 250g bags?
or
(b) can you suggest anything that tastes the same?
or.
(c) if I have to buy it by the kg how can I keep it fresh? Does freezing work?

TIA