wheel spacers?

I am trying to find wheels for my car and am having a hard time! I was wondering if anyone has used spacers on wheels they have put on their cars? I am looking at a wheel with a 40mm offset whereas the original wheel is somewhere between 0-20mm I am told? Anyone with advice on spacers it would be appreciated. thank you

What year car?

it's a 99

Check out H & R part #8065705. My friend put 05 CVPI wheels on his 01 with these spacers.

http://www.need-4-speed.com/h&r.htm