There was an item on the radio the other day and the Woodland Trust were talking about trying to spread mistletoe. You have to mash it up with some of your saliva (to simulate birds digesting it) andthe rub it into cracks in the bark. I'm afraid I can;t remember which trees it prefers - I know it likes apples.
Also they did say it could take up to two years before you see any sign of genrmination as they talked about checking progress each spring.
Good luck