Hi Marky,
If they are the same as for a 4.6 HSE they are as follows.
LSTC2762 LA3GD Silencer Assy. ( Exhaust ) 17.48 plus vat
LSTC2759 LA3GD Filter Ass. ( Inlet ) 7.27 plus vat
Very easy to fit, inlet simply screws by hand into pump and silencer screws to main box at rear under harness.
Both parts are from Land Rover main dealer and prices are current. 15/4/2008
Mounting assy to reduce noise from pump are just over 13.00 plus vat
Incidently remote spares are cheap too 81p for buttons and 1.94 for screw battery cover.
While you are at it check the cruise control hoses for cracking, if cracked or split replace with 6mm bore hose from local motorist centrer about 3.00 for a mtr, just cut to length.
All items were dearer on the web for some reason
Hope this helps
Fred