Yeah, I should have elaborated:

Without knowing your location ruthlessman, no one can adequately answer this question. If you're in a location in the United States other than Nevada, you likely cannot legally find a bookmaker offering fixed odds to let you make such a bet. If you come to Nevada, either the Wynn or the Westgate will typically take those bets. Otherwise, as Wrongly rightly (nyuk!) suggests, Twinspires pools...