some have used them on here and I thought SPL parts made them. The main purpose of them is to make the rim a tighter fit around your hub so you dont have rattle.
If you are talking about wheel spacers then you can use them but make sure you get longer wheel studs so you dont have this happen  Obviously you will have to get different wheels with different offsets because the ones you talked about above dont fit as is and spacing them will equal insanity. If you have a good machine shop around your area I am sure you could get the orginial wheels above and take them to have them milled down a quarter of an inch or so and then you would be flush but is it worth all the hassle and money is what it comes down to.
Also got ahold of powertrix and I change my mind above :). I will be getting my coilovers very soon hopefully.
"Do you guys put the key in "balls down", or up?" -BobbyT 10:28:19 03/06/09 
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17:47:09 02/21/10
Not quiet sure why you want hubcentric rings but I think - 
