Unfortunately the Adrenalins changed country of origin earlier this year, and from what I've been seeing and hearing. The one that comes to mind is on the MX-5 forums, the new Adrenalins are a fair notch below the old ones. I'd give them a go, but here's the thing....
.... I think Bridgestones are horribly hyped and over-rated tyres (As far as cars go anyway, because BATLAX bike tyres are brilliant.), and although they're good, they're never as good as journos and other people make them out to be, and they're definitely not worth the money charged for them. Having said that, I'm ahead of my budget this year, so I'll spend the extra, just to satisfy my own curiosity. Next set of tyres is about 13 weeks away. Watch this space.
I think perhaps the downside to this will be the fact that 225/45 R18s are the size I put on my car, and are likely to have more flex in the sidewalls.
EDIT* Ah I see on the Bridgy site that not all sizes are manufactured in Aus. Anyway I'll get some quotes and see how they go. It's a good looking tread pattern and I'm a big fan of the continuous blacks and void ratio.