Get Transport Canada to "De-register the sailplane for export to USA", then obtain an "N" number and fill out a request for registration, send it to the FAA along with the bill of sale you got from the seller and your check for $5 bucks and the paperwork should be all done. Have an A&P / AI inspect the machine and sign off an annual and then you get to fly your new honey.
JJ
Plus, scrub off the "C" number and put on your new "N" number. Acetone usually removes old numbers and the new one can be vinyl.