There are several replies to your post and I don't know if someone said about this but here's my suggestion. Why don't you contact BitcoinSupremo and ask if he's willing to agree with your terms? He's been running a respectable tip thread in this forum and been doing good with it so far. Maybe both of you will come to an agreeable terms and make some good bets in the future.

Again, I don't know if this question has been answered but if I may ask, why are you needing to bet for your place?