Sorry about the problems, 9 years is great, but many expect to go a lot lonegr without troubles.
I would think Bose would have a similar exprience/knoledge as Su, but not sure about revisions. He is one of the more known and experienced HR surgeons. Most of the well-known docs have done their share of revisions. I believe the BHR manual actually has a chapter dedicated to revision. You should just ask the surgeon/surgeon's office about experience.
How high is high for your Co Cr levels? Something to consider is that 7 ug/L or so action level you see referenced by various medical agencies is designed to be an additional parameter that a surgeon would look at, along with images, fluid, pain, and other symptons to determine if the hip should be revised. Those action levels are not based on systemic toxicity to the body, they are based on the fact that they are above "background" concentrations and they might indicate metallosis in the hip. Sure, no one wants elevated heavy metals in their body, but the action level is very low compared to anything in the literature that would suggest toxicity to the rest of the body. I guess all I'm trying to say is that just because your metals are high, doesn't mean that they will automatically affect the rest of your body. Your body does rid itself of Cr and Co, unlike some of the other heavy metals. As Pat pointed out they go down until the problem is removed. I did see a paper once about an individual who tried taking some suppliments to reduce his metals in blood. I don't think the results were very conclusive.
I think discussing these questions with a surgeon would be really benificial. Good Luck.