Prosthetics are extremely expensive and range in price from basic models which typically are around 20k with all labour to 100k+. Is this for an adult or child? There may be ways to get access to help on a charity basis in some countries. This would be somewhat easier if it was a child. With children the bigger issue is that you grow out of a prosthetic numerous times throughout childhood. Can the family get a TRV to Canada and do they have the funds to support the stay in Canada even without the prosthetic. That would a likely mean living in Canada for at least a month. Where is this family from? Do they live in their home country? How much liquid savings can they show? Do they have family in Canada? Do they have previous travel experience to countries like US, Uk, Australia, etc.