I don't know if you've had any success finding Susan - your message was a long time ago. Many Alderney records were lost during the occupation. It seems you might have some luck if you got in touch with the church - I don't know if you have seen the following info.
The Church of St Anne: Baptisms 1662 - 1902 with annotations copied from an earlier (missing) book commenced in 1628, 1902 to present day in Church only.
Deaths from drowning and Burials 1652 to 1863. Succeeding Registers lost during the Occupation.
Marriages from 1657-1886.
The Priaulx Library have photocopies of Baptisms 1822-1832; Private Baptisms 1819-1821; Burials 1809-1812, 1853-59; Marriages 1841-1886.
Non-Conformists (Alderney only):
Catholic Church of St Anne and St Mary Magdalene: Baptisms March 1849-Oct 1952; Deaths January 1858 to April 1940 and two entries in 1946; Marriages from February 1852 to July 1924
Methodist: (English and French) and Presbyterian Church records prior to 1945 were destroyed during the German Occupation.