Been there, done that. John Purner cut me a .5" spacer out of billet to fit the set of his wheels I use at the track. He did a great job. The reason was I tried moving my front stockcalipers to the rear. Unknown/undisclosed to me was the fact that there is not enough clearance for those calipers when using a 17 " rear wheel. Consequently, I had to go with longer studs, but the knurl size of the 97 Viper studs was a size that I could not duplicate (and I looked a lot of places). Finally, I had to use something like 3" studs, which were too long and which had to be ground off a half inch or so to get the stock center caps on. Moreover,we had to hog out the hubs a bit to accept the off-size studs and last summer they wanted to back out when we were putting the rear wheels on and trying to torque up the lugs.
All in all it was a supreme hassle (though they are still on my rears). Moreover, many stud makers warn against using spacers. Mine were so well done and customized to my application, that I didn't worry about it. I would advise, however, that you do something else to make your car look unique (and probably ricey anyway).