I tried again last night, and I think I'm going crazy.
There's no demo link to be found. I've tried everything I can think of. I've searched the store and found the page that way, and I've also browsed through ALL PS3 games and found it that way too. Neither way presents me with any option other than to download the Trial and Unlock, which it states is 93Mb, but only ever downloads like a 6Kb patch.
I was going to take photos last night to show you what I was seeing, but I honestly couldn't be fucked.
I'm sure I'm not missing something. If it IS there and I AM missing something, then I cannot believe how god damn convoluted some things are on PSN/SEN.
@FictionSuit - when I've searched for it I can't even see a demo... but I will try browsing the demo section tonight for it. This is the only thing I haven't specifically done. Ta.