There are a number of Öhlins on eBay (all new). The best price seems to be £487 delivered.
http://www.ebay.co.uk/itm/182647621244
I think if I were shopping for one now, I'd definitely think about Nitron or K-tech (I've got K-tech fork internals). You'd get the shock built to your weight whereas, with the Öhlins, you'll have to use their stock spring of 115 N/mm. (Of course, you could change it yourself, but that's more expense.)