There is a place in Chester, 'Great Outdoors', with a closing down sale on at the moment, happened in there by chance a few days ago and they have Lowe Alpine daysacks (Dutch military style, with the DPM straps) for about £40 if I remember rightly, brand new with the tags still on - I don't think it's exactly the one you're after but it's close. They also had some North Face zip-up daysacks, less likely to be a good hiking/bushcraft type pack but would be a good 'everyday' kind of bag, for £30.
I've no connection to them but googling them turned up this:
http://www.localdatasearch.com/ches...ng_equipment_supplies/great_outdoors-10184706 - I was sorely tempted but can't really justify another pack to myself just now! They could be worth an ask, if you are still looking and if they still have them in stock. I can't really vouch for them, not bought from them before.