My grandfather is 94 years old and wants to come to Canada for 10 days for my wedding but can not get medical insurance because of his age. Anyone know any companies that provide medical insurance for 80+ year olds?

Blue Cross

That may be difficult to find.And I am assuming he won't get a visa without having medical ins.I would phone every possible insurance company in the UK and maybe in Canada as well, and explain the situation and ask them all. Also, ask each of them if they know of any way he can get medical insurance and where.You might also contact Canada customs if the problem is they wont let him have a visa without it, and see if you or he can post a monetary deposit or something in lieu of ins.I wish you well in your search, and hope that your Grandfather can make the trip.