Networks USB wireless network adapter & Vista x64

Ok, I've been searcing the net for a lifetime and I've found nothing!

All I want is any USB wireless dongle with drivers for Vista x64 (ultimate version if that makes a difference!), does anybody know of one?

My current stick works under XP x64 but that's only through checking FCCs etc to find the actual manufacturer. I'm skeptical this dongle will work under Vista as it is flakey as it is (weak signal )!

I've found drivers and details on Vista x86 but that's as far as I can get!