No need to buy a replica, you can still order the original wheel from the original manufacturer here in England, Moto-Lita Ltd.
They still have the original patterns and can make the flat spoked wheel with slots in the rim and a slate blue (original) or black leather rim. Don't try to find it in their catalogue, it's special order only.
Moto-Lita Ltd.
Thruxton Airport Industrial Estate
Near Andover
Hampshire
United Kingdom
Zip Code: SP11 8PW
Phone: 0011 44 1264 772811
Fax: 0011 44 1264 773102
Contact: Simon Green
Ask for a GT 40 wheel, flat spokes with slots and specify the rim colour. Also ask for 6 no 5.5m.m. diameter bolt holes at a pitch circle diameter of 78 m.m.
They can do 15"(original),14" or 13" diameter. We nearly all run 13" wheels in the UK.
The price was £130.00 (about $210.00) in 2000, so it may have gone up a bit since then.
Please be aware that you are dealing with a British Craftsmanship operation and not Microsoft, so things don't happen instantly, just lay back and enjoy the experience!
Once you have got your wheel you need a bezel and a badge for the front and a boss for your steering column. I have a sketch with dimensions of the bezel measured off an original car, as well as a photo of the whole assembly, e-mail me and I will send them, any good machinist can make the bezel and boss.
The badge is more difficult. I had 10 made last year but they have all gone, I think Fran Kress does one, the correct diameter is 58m.m.
I hope this is helpful.