How close of a rep. do you want it? I dont think the tank was ever in-car in the wrc 206.
A proper moulded tank( to wrc/fia spec) in correct placement will run you silly money....nigh on 6k last time i looked.
If you just want a nice incar setup then i'd give the guys a Pro Alloy a ring, they can build a full tank with internal or external collector(swirl pot), pump, filter and filler mounts, holders and brackets.