I am from Ontario. I've been going to the Champs for over a decade now. I've paid with US money order for many of those years. They are easy to get at most banks, and postal outlets. Even some variety stores will sell them.
Then new R/C Scoring Pro software will be a pleasure to work with. Fastcats in Oakville, Ontario has been running it since it opened 2 years ago. One word. Flawless! No crashes. User friendly. Easy to add racers and move people around. A smart move for making the Champs an even better race.