erm, the little torx button head screws? Might have some in one of my random nuts and bolts tubs.
edit: sorry, just realised you said top cover mounting bolts. Those are just normal 13mm bolts at the top and 10mm at the bottom (if you bother fitting them)
As for price I'll have to weigh the manifold and suss out postage cost, I'll let you know.
Do you need any of the breather pipework, cold start injector etc. to go with the manifold?