I had the same situation recently. Warped disks and wanted to upgrade.
Decided on DBA Silverfish disks and even ended up talking directly to the sole UK Importer (a man called Tony Mason) as advertised on the DBA disks site.
Apparently he used to be an employee of the UK importers and has now bought the rights to set up on his own but is taking some time getting the paperwork sorted. :duh:
Anyway he did tell me over the phone that they have stopped manufacturing the front Gold DBA disks and they wouldn't be available any more!
Ended up getting Black Diamond disks whichc have only been on a week but seem okay so far (not worn in yet)! Put off a little by the Max Power logos all over the box!