Hi Jamesi can speak from personal experience as i am currently in the process of converting a Disco 2 into a G4 replica.
firstly, i have had nothing but help, support and encouragement from members that i have spoken to both in person and on this forum - so welcome to the club. the green oval in whatever form it takes tends to bring people together!!!
as for building a G4 replica on a brand new vehicle, can you buy them in Tangiers Orange? if not it is a massive job spraying a brand new vehicle to a high standard - if you can find a willing body shop to do this!!!! :w00t: be aware they will charge you well for it, mine had 90 hours work booked to it but i know it actually took more, plus the cost of materials.
if you get over this hurdle the guys in the owners club will help you locate the bits that you need, but again, authentic parts command high prices.
Despite the cost, there is nothing more rewarding than driving an unusual vehicle that looks great and gives you a fabulous talking point when you go down the pub!!!:D
Good luck
Norm