Keyboard needed

Earlier today I managed to dump my 0.5 litre mug full of hot sweet tea over my MS Natural keyboard. And desk. And floor. And self. Urgh.
I might be able to clean and fix it, but that will take a few days. My backup is an older model of the same keyboard, which I like a lot less, and turns out not to work anymore. I am now using a horrible straight plank as emergency backup. I apologise for worse than usual tyoping. 

Thing is, I need a new one anyway so I have a backup, ideally I'd love another 'natural multimedia keyboard' like I was using, but nobody sells them anymore. Should have stockpiled while I could, just as I did with mice!

I know I have some split-geekboard keys split-keyboard geeks among you lot - does anyone know a source for cheap MS natural boards? I need QWERTY in US layout, so with @ above 2. Alternatively, any other boards that are decent and don't cost the world? I can't afford the newest MS Natural (45€!). Anything proclaiming to be ergonomic because it's curved or waved isn't useful to me, it has to be split. Wireless is no added value for me.