Do it! It won't hurt my feelings to see you make a RUF car that way. There are numerous ways to source the original RUF parts and placing a RUF badge on the car is acceptable in my book. I wouldn't go too far in calling it a RUF built car, but there isn't anything wrong w/ using RUF parts on a Radium King built car.
Making our Boxsters unique is a big part of the fun. I'm building my 2000 Boxster into a Boxster GT using 986, 996 and 996 GT3 pieces and parts and it's going to wear a 986 GT badge. Somebody doesn't like it, they can chase me around the track and try to take it off!