Buy a new tree that is compatable pollinator for both .

I think pecans need a male and female tree

Are there no neighbours with pecan trees? I have a large old pecan tree in my backyard (was a mature tree 40 years ago, 60-70 ft tall, and about 40 ft wide) which produces pecans (unknown large long thin shell variety). I don't know where the nearest other pecan tree is, but I do know it is over 500 feet away, so they can cross polinate at some distance. (I know where there are about half a dozen pecan trees about 750 feet away according to google maps)

Consider Kanza... a late Type II pollen producer, producing a high quality kernel, and with exceptional scab-resistance.

Have no personal experience with Moreland, but it is a Type II with good scab resistance, so would fit the bill.