If you know the paint in the states is the proper colour; see if you can find a parcel pick-up business like this one in Port Huron.
http://www.usparcelpickup.com/Port Huron is a bit far for you to go; but there might be a similar business in Niagara Falls or Buffalo?
I've used the Port Huron location a number of times, where a parts supplier would not ship to Canada or the shipping and brokerage fees were out of line.
It's a free registration with the business; when you have something to ship, you give the supplier their address. When it arrives at SCC they E-mail you to let you know. Go there pay them $5.00 a package and that's it.
Declare it at the boarder; making sure the bill of sale says it's for your vintage vehicle and there's no duty to pay.
Dan.