Recommendation for services that help with international car purchases

I have the shipping lined up, as well as a broker who is handling everything with customs. However the transaction with the seller I would need to fly out there (which is not ideal at the moment) unless there is a service that can assist with this part of the transaction. Two of the cars are in Canada that I will be purchasing. I have used KeySaavy in the past for out of state purchases which was seemless, but they don't offer anything for Canada. Any help would be appreciated!