Hi Tahr,
I seem to remember a post some while ago by British Red, who had received information to the effect that Nanok were closing down their UK operation, and so stock held here in the UK was being sold off at bargain prices by retailers (dont quite understand the logic of that).
I've just had a quick look and I can't find an Endurance 0° for anything under 70 quid. I think you may missed-out on the bargains.
However, Alpkit do good down bags, and the good news is they do them in three lengths. The largest is recommended for users of 207cm maximum in length (height) which is about 4½ inches taller than you are. The AlpineDream 500 has a comfort rating of -5°C and at £90 including VAT and delivery (it also includes a compression sack and a large sack for long term uncompressed storage) isnt that much more than the available stocks of the Endurance 0°C. I have one, theyre very comfortable, and if youre tempted you can find detailed information here:
http://www.alpkit.com/alpinedream/
And detailed dimensions here:
http://www.alpkit.com/shop/cart.php?target=product&product_id=16157&category_id=253
Best regards,
Paul.