Not a chance of finding a decent, clean, non bloated one for under £400 and even then it will have visible splits and cracks and a new one would be £1k plus if you could find one that is.
If its not a show car better off using a new 4x4 one from ebay for £70 odd quid, they look the part and I can sell you the proper Ford rubber hose to connect it for £25
http://www.ebay.co.uk/itm/3316865407...84.m1555.l2649