New exhaust arrived on Monday from North America. I took a bit of a risk on this one in pursuit of making the engine noise a bit more sporty (along with the K&N filter and pipe), it was on eBay from a North American supplier and there are a couple of MR2 Roadster forum owners who've fitted this so I could see/hear it on the car via videos they had made. All in with shipping and import duties it was less than 220 GBP and only took around 5 working days to arrive.
Quality is better than I expected and it comes with gasket and fittings. Plus it feels about half the weight of the stock exhaust.
I'm hoping to fit along with the induction kit over the next couple of days so I can get the rear clam on for a better trial fit and then get on with the sills.
Rear spacers on order now that I've got the wheels.