Another suggestion would be to get the external stuff (front and back lights, grill etc) from an older rolls as these will really make or break the final look.
I am not a hands on car freak but ive seen some awesome stuff in (merc though) in emirati/omani/european scrap yards at literally throw away prices ... am pretty sure rolls stuff can be found too ... respectable looking and fully functional older rolls are available under GBP 5,000 so parts should be cheap too.