magnaflow S/S mufflers AE111 custom exhaust what works?

[AE111_modifier]

Can anybody tell me where to buy stainless steel Magnaflow mufflers from in New Zealand...... I live in Dunedin. I'm trying to find a nice stainless steel oval 2.5 inch straight through centre to centre muffler. I'm going to have a straight through 2.5 inch system on my AE111 4A-GE blacktop. 2.5 inch from the collector that is, I believe the collector is 60 mm (2.36 inch's).

I Have had other systems on it before, including a duel rear muffler system that had two straight through stainless steel N1 style mufflers each with four inch tips. It looked, went and sounded very very gnarly, it was very very very loud! (green stickered). At the moment I have the duel system with baffled mufflers on the back with 3 inch chrome tips (not as cool, and doesn't go as good). The duel system is 2.5 inch from the collector and then near the rear sway bar it splits into two 2 inch tubes, its all mandrel bent as well (of coarse). The two rear mufflers are bolted on as well. There's a extra long 2.5 inch coby up front as well. Even with the baffled mufflers its still reasonably throaty\noisy and at about 3000 RPM it gets a real hollow tin can rasp to it.

Do you guys think in terms of performance its best to leave the duel system on and maybe put a straight through muffler on one side and have a baffled one still on the other side (quitter). Or just change it to a single 2.5 inch mandrel bent system.

All information is hugely appreciated!
Thanks Tim