Had a look at Samco's site and found what I think is the rough equiv of the ancillary hoses on the Newage.
http://www.samcosport.com/uk/car_kits.asp?make=Subaru
“Subaru Impreza GC8 EJ20 2.0 STi, WRX, GT Vers 3~6 97-00 TCS87/C Coolant 8 hoses”
This does seem to include the rad hoses though, so it should be interesting changing those as I've never done anything like that before.
I then reckon adding...
“Subaru Impreza GC8 EJ20 2.0 WRX, UK GT Ver 5&6 UK 99/00 TCS143 Turbo 3 hoses”
...and...
“Subaru Impreza/Legacy Fits onto TB770/997/1218 suitable for 90mm maf TB1095 Airbox hose 1”
...should get me all the hoses I need to 'tart' up the engine bay.
Will probably cost far too much, so I'll put them on my wanted list.