This sounds weird, but when I pulled my radiator 3 of those small square radiator cushions were missing. I believe there should be 6 in a set, I have 1 good one and need 5 more. Pic below......
There should be 4 (2 on each end). So I think you need 3 of them. Just cover shipping you can have them for free+shipping. I can send pictures if you want.