Stuck in a finance deal with Mazda US?

I'm UK resident, I have just married my American wife and am paying off her car finance for a Mazda CX-7 she has in the states after she moved here. It is financed by a Mazda US company and there is no alternative company in the UK that the finance can be transferred to (Mazda UK can't help), and thusly the car cannot be moved here either. I knew I'd be paying for a car we can't use but the recent fall in exchange rate is taking the repayments up to impossible levels. Any ideas? The deal has three years left and is, at present, �750 per month, see why I'm looking for alternatives...