Hello alli,
There doesn't seem to be much from Huish-Episcopi in the online IGI (Hugh Wallis's site lists just one batch of marriages from Huish-Episcopi,1698-1812).
However, the LDS seems to have filmed lots of records.
A Place Search in the Family History Library Catalogue for Huish-Episcopi brings up the following.
England, Somerset, Huish-Episcopi - Church records
Titles
Bishop's transcripts, 1597-1623 / Church of England. Parish Church of Huish-Episcopi
Bishop's transcripts, 1605-1857 / Church of England. Parish Church of Langport
Bishop's transcripts, 1613-1865 / Church of England. Parish Church of Huish-Episcopi
Churchwardens' accounts and vestry minutes, 1717-1861 / Church of England. Parish Church of Huish-Episcopi
Marriages at Huish Episcopi, 1698-1812 / Church of England. Parish Church of Huish-Episcopi
Marriages at Langport, 1728-1812 / Church of England. Parish Church of Langport-Eastover
Parish registers, 1678-1906 / Church of England. Parish Church of Huish-Episcopi
Parish registers, 1728-1911 / Church of England. Parish Church of Langport
Perhaps if you were to order some of these films in to your local LDS Family History Centre, you might find some relevant records?
Regards,
JAP