A picture of what you're up against would be helpful, but barring that...I've got some ideas on what you can do.
You could have the hinges chromed, but I'm guessing it would be more expensive than buying new hinges.
On the pulls, you might be able to get away with 3 1/2" pulls if the base of the pull covers the elongated hole. You'd just need to elongate the holes (more like an oval) and then mount the hardware. But, if you look around, you should be able to find the right size eventually.
Here are a couple of resources I've used in the past...