You have three choices
1 scour the scrappys for one to fit, if you are really struggling get a manfiold and downpipe (will need both) from a 16v, if you aint managing to locate original willy ones (there different)
2 Get K-Tec stainless jobbie for £300 (actually ok price for stainless manifold and downpipe)
3 Bite the bullet and pay a silly price from reno
If you get one from scrappies, they are actually not that difficult to remove and refit, give us a shout if I can help anyymore