hi irishronin,
I wouldn’t be doing my job if I did not invite you to take a look at http://www.vipprofits.com 
We service the top sportsbooks and casinos in the industry. Our affiliate program has been around since 1997 and last year alone we paid over $1.8 million in commissions!
Before you keep looking for the sportsbook that allowed you to mirror their site, I suggest you do some research into searchengine implication of mirroring a site as well..
We found that affiliates that setup their own site with unique content do best. It is worth the investment in the long run for sure. Plus the site wil always be yours and you can add and delete brands anytime you like.
We offer free XML feeds for your websites and recently added free sportsstats and sports information. All these will have your tracking code included so you will get credit for every player you refer.
Please feel free to contact me a support-at-vipprofits.com if you have any further questions.
Thanks,