Rudy....why not do what I did? Immerse yourself in them, maybe draw one with compass and ruler...And request one to turn up in your area!
I guess you'll have to wait until Spring at least....although Ice Circles have been found before! (on a pond - a perfect circle cut into the ice and it was spinning slightly - no tracks! - I know that sounds like something from a movie but it's true!)
Is there a US Crop circle society that you could volunteer with, so that YOU get the phone call? ooooh....very exciting!