£108 is cheap.
8v and 16v have different exhaust diameters. You could use a reducing section, that steps the diameters down, but it'll probably wipe out most of that £15.
DIYing exhausts is a pain. The bolts may come away easily but you'll probably find that the sections of exhaust have...
Didn't hang around long did it? Glad to hear its gone to a good home. I have to say I miss mine at times. Especially miss having a petrol engine but needs must. Let us know what replaces the valver, and stick around on here!