Knowing that this is a very old thread but never seemed to have a finish to the story, I'd like to suggest that some headers designed for LHD and RHD cars don't compromise.
I offer 3x header versions, a single fit-all exhaust and a choice of mufflers. The exhaust'll fit 2x seaters and 2+2s and the whole kit is in stainless steel.
So far, I've only sold a couple of JDM-style twin-pipe rear mufflers into Aus. so I'd be interested in working with anyone wanting to fit one of my entire systems.
Quality-wise, I'll stick my neck out and say that they're comparable with those exported from Japan (except on price) and way above those exported from the States - Stahl were good but more expensive and no more.
Obviously if you guys rely upon local exhaust shops, you might get better deals especially avoiding shipping and potentially customs duties.
I merely wanted to point out another option to those mentioned above and an after-sales service including spare parts second to none : produced and sold by a genuine Z-fan !