This has the same Isuzu engine as fitted to the Vectra and saab.On these the fuel inlet metering valve would give trouble but could be replaced as a seperate part for around £200+labour.As you have found out ,the labour to replace the pump is disgraceful,so wold you want to fit a recon unit?Who pays if it packs up after 6 months.New high pressure injector pipes will also need to be replaced if system has been contaminated through pump disintegration.hth