ACS also do one-fits-all plugs aswell, for around 20 quid, but please for the sake of your hearing only use them as a tempory measure, its not cheap to get custom plugs, but your hearing is worth allot more, and its really worthwhile getting higher end ones because the sound you hear is still very clear, you are less likley to pull them out half way thru the night coz you are bored of the muted sound you get with cheaper ones
also its worth giving your ears time to adjust, dont walk into the club and get straight in front of the sound system, build up your exposure over the first couple of hours so your ears can adjust. allot of hearing damage occours with sudden volume changes