Yes, there is, infortunately, very little of use on the internet about
Church architecture. Although we are planning an exhaustive treatment of
the subject in the future, we have not been able to complete it as yet.

Britannia has a small bit of material that you may want to view at:

http://www.britannia.com/church/church2.html

http://www.britannia.com/church/church8.html

http://www.britannia.com/church/church8a.html

http://www.britannia.com/church/church8b.html

http://www.britannia.com/church/church8c.html

http://www.britannia.com/church/church8d.html