http://www.freereg.org.uk/parishes/som/c.shtml#
It says Crewkerne is available from 1559/1599 for St Bartholomew.
Cudworth only begins at 1701 on free.reg
Chaffcombe baptisms and burials 1623 but marriages 1599.
You could try ancestry itself, findmypast, FamilySearch, or you could try and contact one of the parish OPCs and ask for information on the Somerset OPC website.
http://wsom-opc.org.uk/ or ask/go to the Somerset Archives (I'm not too sure where they are!)
I'm glad I could help!