do a search for "full moon caps" or "racing moon caps". I have looked at them before. they are on the expensive side though (as far as hubcaps go). I have heard mixed reviews on how they affect fuel economy. I have heard that they help just not much (one person reported 2-3 tenths of an MPG better) but they do look really cool.
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Be the change you wish to see in the world
--Mahatma Gandhi
Older hubcaps can be found cheap and are pretty decent...Pinto
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2006 Jeep Liberty CRD...Founder of L.O.S.T.
OME 2.25" Lift w/ Toyo Open Country HTs 235/75/16s
ASFIR Alum Eng/Tranny/Transfercase/Fuel Skids
2002 Air Box Mod...Air Tabs (5) on Roof...(3)each behind rear windows
Partial Grill Block with Custom Air Scoop and 3" Open Catback Exhaust
Lambretta UNO150cc 4 Stroke Scooter