American LHD cars built after 1988 imported into Australia have to be converted to RHD for road use. Consequently there has developed a healthy conversion business in the antipodes and I believe several C5 'Vettes have been so converted. Done professionally it's obviously a very expensive job and usually adversely affects the cars value anywhere other than in Oz. Bonhams sold one in the UK about three years ago....
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here, so they are about. You might have a hard search for another over here though.
As Rosco points out, LHD really isn't that big a deal. Drive one for a few weeks on UK roads and it quickly becomes second nature.