Btw, do you have any of the old header pipes left and bits of the exup valve? Only asking coz I usually get header pipes from Germany eBay at good prices but they are,nt always complete.....sometimes the pulley is missing off the valve or the whole lot isn't,t present.
Might be worth you having a look. Search Exup or exup walze on eBay.de
Jase try www.performanceracingparts.co.uk unless you are on a budget they did me a complete exhaust for not much more than a set of second hand pipework off evil bay.