Beaubri Basenji's in mission bc are one of the top basenji breeders in bc if not Canada. If you are still looking I would get in touch with Simone she is the breeder.
They just added a race on Sunday August 28th in case anyone is interested in coming to see what LGRA straight line racing is.
It's at Irvine Regional Park in Orange, Ca. We get there early, around 8-8:30 and are there all day.