so you need access to the surviving church records for the civil parish of Kilrea according to PRONI website
KILREA, CO. LONDONDERRY
C.I. Kilrea (Derry diocese)
Baptisms, 1801-1961; marriages, 1802-05 and 1829-
1905; burials, 1802-04 and 1829-96; vestry minutes,
1736-1951; notes on the parish of Kilrea, 1607-1947,
by the Rev. Edwin G Parke.
Registers of vestrymen, 1870-; preachers’ books,
1869-.
MIC1/54/2-3, 55; MIC583/3;
T/799/7
In local custody
P. 1st Kilrea
Baptisms, 1825-59 and 1862-70; marriages, 1825-99;
session minutes, 1825-52; committee minutes, 1825-67
and 1910-32; communicants’ roll, 1865-6 and 1891-
1932. MIC1P/87
P. 2nd Kilrea
Baptisms, 1840-85 and 1903-1930; marriages, 1845-
1929; committee minutes and accounts, 1860-70 and
1886-94; correspondence and notes on the history of
the church from 1832 and events in the church, 1938-
64; session minutes, 1840-80 and 1903-1957; session
and committee minutes, 1906-62. MIC1P/20
R.C. Kilrea (Derry diocese)
Baptisms, 1846-65; marriages, 1846-77; deaths, 1846-
77. MIC1D/58-59
good luck onwards JimG