CDS tube or T45 for the cage. Custom cages will do a complete cage all pre-bent for you that you just weld together yourself. When I looked at one for my EK9 it was around £500.
In other news, I've replaced my daily. I now own 2 civic type R's, one an Ek9 the other is an Fn2.
TF has really good SEO cos of all the links to external sites people put into posts, so spammers think there crap will get a gazzilion hits, whilst the reality is that actually everyone thinks the person is just a total tw@t.