Where to buy lips/step lips?

Well guys i got my wheels on the way and i was wondering is there some sort of company that sells step lips for wheels somewhere? I been searching online for the company Avus wheels and no luck. So i was wondering of there is a company that specialize in this?

tunershop.com
 
*edit - a step lip will make your rims 21s

thanks for the link i appreciate it. So looking like 21" is a good thing i take it..?

it won't LOOK like... it WILL be. a step lip is generally 1" larger than a reverse so it will become a 21" diameter. you'll also need inner barrels and new tires. more work than those wheels are worth imho but if you love em enough to dump another couplle thousands on em then go for it.
 
they make be willing to make reverse lips for you as well.

dang the hell inner barrels... reverse lips? i thought you just buy the step lips and take apart the ol lip and mount them onto the wheels lol. Those wheels i have are going to be my first 3pc wheels i ever purchased so if i do attempt to take them apart i would be totally clueless. What is reverse lips and what is the barrels? yeah after i saw the price for all 4 lips can cost 1g fast... maybe sometime in he future ill buy them.