Pear Gall Fungus

A lot of the leaves on the Conference Pear in my garden have orange blotches on the upper surface this year. On looking underneath there is a swelling with little "parasols" protruding.  After a bit of research I have found that this is Pear Gall caused by the rust fungus Gymnosporangium sabinae. Apparently it requires 2 hosts, the other being Juniper on which it causes clusters of finger-like swellings on stems.  I have a Juniperus sabine 'Tamarasciflia variegata' in the garden reasonably close to the pear tree, but so far have not found any signs of the fungus on it.