I've been checking out dlhoulton's thread from back in January on his air filter swap and thought I would add to it with some more info.
Here's a link to the thread.
According to the thread a 57mm flange is needed so I did a little looking at K&N's website and using their universal air filter search came up with a lot of choices. And there are no adapters needed for the flange as they offer many 57mm flange size filters.
Here is the link to the tool.
Just choose the style you want (round, oval, conical) and then choose the flange size, angle offset, etc.
This is the one that I like... RC-1252 $68.99 for a set of 2 http://static.summitracing.com/global/images/prod/norm/knn-rc-1252_w_m.jpg
They look like they could be attached without needing a support bracket. Have to make that decision after getting them.
The best place that I have found to get K&N is Autozone. The local store can get them usually overnight and for a better price than anywhere else.
Just more info for anyone that may want it.