Ikea seem to have taken all their summer stuff off the website already - rubbish!
However... Argos has their wooden ones on special offer - 2 for £100 but I guess that's only any good if you want two. Same thing at same price also in Homebase .
Both of them also have a cheapy one that's rather cool in a minimalist way.
Think a 'steamer chair' is only one that folds away in a specific way, originally to save on deck space when used on boats - one here where you can see the hinges etc. If you don't need that particular folding mechanism you might get more hits just looking for a lounger. Or even re-posting under Products...