Dave,
Simmonites do a kit to convert 200Tdi headlights to 300Tdi, includes the grill.  ISTR they are about £250ish.
I picked up a Bumper and end caps and plastic bits for my 200Tdi from a breakers.  Cleaned the bumper up and gave it about five coats of Hammerite Satin Black.  Looks good.  Paid £75.
The headlights are one of the things I'm gonna change at a later date too.
HTH