East Devon comprises 29 parishes and the Tithe Maps for these parishes have been digitised and are now freely available online. The site notes that the map for Rousdown is not at the Devon Record Office and the Sidford map is yet to be scanned.
A nice, straight forward easy to use to website with just one click to get you to the actual map.
http://www.eastdevonaonb.org.uk/dro/index.html
