Found this source. says custom made to order, I think you can tell them thickness? anybody want to be the guinea pig for this one? anyway at 45 each I think they are a pretty decent deal. free shipping and lug nuts included!
Check it out here
Wheel adapters
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brad131a4
Re: Wheel adapters
Not to bad of a price and a bunch of bolt pattern choices. I would like to have them hubcentric to the rims that you would be using other than that not bad.