1st gen and 2nd gen 5 lug wheels

I'm looking to buy a set and would like them to be interchangeable between the two.

I believe the only difference is the hub bore is 67.1 on the 1st gen and 60.1 on the 2nd. So I'm wondering why does tirerack say more wheels are available for the 2nd gen? Won't they both need hub centric spacers and come with a 70+ center bore? Unless the center bore is less than 67.1 I don't see why they would not work. And tirerack doesn't list the center bore in the specs.