Laptop stand recommendations please

[xsquared]

I've had a look at done on Amazon for ideas and quite like the look of this one but it's out of stock on Amazon at the moment. I had a look at Argos and Curry's but they don't seem to have anything suitable.
It's to hold and elevate the height of my MacBook as I don't want to keep using the encyclopaedia as a stand.

TIA