Yes you can do that and not having to uplift your apple:

-One way is to gather your pear wood, some 'winter banana' apple wood, and learn how to double graft onto your apple branches.
(winter banana being the mutually graft compatable to pear interstem)

Around here it is risky grafting on anything greater than 2-3 inches of diameter. I read that and also confirmed the poor results on a 5 inch pear tree.

-Then you will have the same codling moth problem on pear as what you had with your apples to contend with.

Any other ideas?

From my own experience, pears have no problem with coddlng moths or rust around here.  I have had fire blight or similar disease but it's been many years since I've seen any problem with that.

In general, Druids are more concerned about oak or ash trees, and other (hazel, yew, alder), but apple trees do have a place in Celtic lore and symbolism.  With Asmead's Kernel, asking for Druid intervention might be wise, since it's such a venerable cultivar.  

I have a 18 year old multigraft pear.  Some cultivars grew better than others.  It's a fun tree.

Daniel, your the second person this winter I have heard from Battleground stating the same thing about, more or less low incidence of pear infection from codling moth. The only difference is he had his pear orchard for a long time and uses phermone traps and I don't because my neihbors have apples and infections etc. 

One new thing that I did learn from him was that the cooler and cloudier conditions near the hills cause enough of a climate and cooling trend that his summer and late pear crop get internal problems, that for us in warmer areas, are not so much a concern, as we do have suffering that way for only our early pears. All my regular pears  are about Aug 15th and have fast core breakdown problems. ..nothing like a fresh picked pear on a hot day though. Yum!!