2nd hand twin wheel sprinter axle wanted!

[motovelo]

Having been quoted between £800 and a £1000 to rebuild my noisy diff (whining) on my '96 Sprinter 412D I have decided the most econimal route would be to take a chance on a complete secondhand axle and get somebody to fit it. Problem is there are loads of single axles available but I can't find any twin wheeled ones? I've tried Part Finder and scoured evilbay but no luck. So if you should have one lurking somewhere please let me know. I don't want to pay silly money but will pay a fair price and fingers crossed it doesn't turn out to be as knackered my current one!