They'll be alright if you either get an adapter or get the centres machined to suit the Ford hub. Either way it's not going to be that cheap and you may be better off with proper Ford wheels. Have a look on ebay. There's loads of spacers on there that may well do the job. Car customising mags may well have ads for such things too. Check out the cost of machining at a local light engineering shop.
You'll have to check that the offset is within limits as well. It can be adjusted one way with spacers but, again will need the wheel machining if it's too far the other way. There are limits as to how much metal can be safely removed. That's worst case scenario though and, without looking, it will probably be near enough. Measure the distance from the back of the rim to the mounting flange and compare to the wheels you have. Make sure to take account of possible differences in rim width.
2008 2.0 TDCi Zetec