Thanks for replies guys , id seen the carparts.co.uk and noted that one. despite posting on a few forums and phoning around a used No1 injector hasn't turned up so biting the bullet and buying a new one;
VM offered me a second hand one for £240 plus post plus vat so £300- then they couldn't supply it as customer didn't confirm he wanted to sell it! Their new price is £287 plus post plus vat £356.40!!
so I've gone with carparts.co.uk £266 inc vat and post - part is coming from Germany , ill let you know how I get on! The guy at VM diesel specialist warned me they can be hard to get out, the pipes on the side can easily be broken if socket slips, He said he modifies a ring spanner and has no issues using that method.... fingers crossed