Black top flywheel will fit but the clutch won't work with the box.

The st170 clutch has 23 splines same as a vauxhall. Zetec has 21. ( or other way round. Either way it don't fit lol )

You can get solid kits from the states.
I've heard a rumor some one used a vauxhall clutch plate and a modes zetec flywheel. Dunno if it was just pub talk or fact