Ordering a black envelope

So today we had a nightmare trying to get hold of a black metallic bubble envelope. We found that staples had packs of them available in colours black, silver and red but they could not guarantee the colour we would get as they are selected randomly from the warehouse and they didn't have then in stock in either Leeds branch (we rang up to enquire about this). Are only other option was http://www.allcolourenvelopes.co.uk however, these come in bulk packs of 100 for £49.95. So we decided to ring up and enquire as the whether it would be possible to purchase just one and they kindly said they would send us one as a 'sample' if we filled out the online form....

 Fingers crossed it will be here tomorrow as it should be being sent next day delivery.