The spacers that have their own lugs attached will cost you over $150 because they're billet aluminum. The ones i speak of are just a thin sheet of aluminum that sits on your lugs and just sets the wheel out. They cost around $20 for a full set and look something like this.



I know they work because the guy i bought my HX wheels from had a set just like these and he had plenty of lug to tighten the wheel up safely.
Either way it's cheaper to go buy them and test them out, if the lug doesn't give you enough clearance then take them back. The billet spacers however are most often un-returnable because they are considered a custom part.

 

http://cgi.ebay.com/ebaymotors/4x100...QQcmdZViewItem these are what I was talking about...if you fear having not enough lug space, why not upgrade to longer lugs?