I've hunted high and low too. I either wanted TE37 (or replica) for mine or Enkei's RPF1. Using pcd adapters is effectively like having spacers and the wheels aren't friendly on the offset for them It's a shame because Ford also have 5x108 bolt patterns, so it's not uncommon. You'd have thought Rota would like to sell wheels across all manufactures.
I come across these a while ago, but can't find 17"
I'm sure 9in will stick out from the arches, especially at that offset. Try this when you're comparing wheels - www.willtheyfit.com. I've just put in those new numbers and the wheel will stick out 45.1mm more than the standard.