Something its worth doing (and I'd recommend this to anyone who needs another tank in the future) is on ebay set up two searches in the "Aquariums/Tanks/Bowls" with buy it now switched off, distance less than 10/20 miles (depending on how far you're willing to travel to collect) and set one search up with the keywords, "aquarium" and the other with "fish tank."
Most auctions last 5 days so if you check a couple of times a week you'll find a bargain that way. I've bought all my tanks that way (with the exception of one I was given by a forum member) and as long as you read the descriptions carefully, you will definately pick up a suitable tank sooner or later.
If you're willing to pick up a hammer, nails and (or a roll of self adhesive, beech effect sheeting) you'll get one quicker as you won't have to worry about a stand. B&Q will cut MDF to size for you, all you need to do is screw/nail it together.