Thank you for your return email.
I searched for Presbyterian ministers in the Ballymore-Tullymacann-Tandragee areas of Armagh, but did not find a listing for them online. What you can do is contact the Presbyterian Church in Ireland information office, and ask for the name and address of the ministers serving the churches in the Ballymore area of Armagh. Explain that your ancestors had children in Tullymacann and Tandragee, and that you would like to obtain the christening records for these children, and the marriage record of David Park Shannon and Jemima McCorack.
You can send an email to the office at: firstname.lastname@example.org
Please let me know if you hear back from the information office.
Best Wishes Grace,