I would do exactly what Ralph (neelyrc) did. Whatever you do, in some years you may feel different about it. As crazy and anal some people in the hobby are about "Originality" today, you never know. When I bought my 280SL in 1982, it had 4 aftermarket (Intra) Bundt wheels and the original steel spare with the original Phoenix tire. A colleague of mine at work had a late 60s 280SE that had 5 original forged Fuchs alloys. When he sold the car, I talked him into trading wheels with me and he did. I ended up with 5 Fuchs wheels and he got my steel spare and 4 Intras on the car.
I really don't know how I feel about it today.