Thanks for the advice gents, i have emailed all the 3.0's for breaking on ebay tonight and will see what if anything occurs tomorrow,
I haven't seen the diff so am not sure if it has a cover plate or not but thanks for the heads up, i will let him know.
He's been quoted around £150 - £200 to fit the diff (if it hasn't got a cover plate i'd presume) and i did say, from searching on here that some fit the front and rears from the 2.7 and there does seem a lot more 2.7 diffs around fairly cheap it just depends on labour costs if possible i suppose.