Sam,
The facts are a little confusing to most people as many of the names have been used universally over the years. Dunstall, Rickman, Avon, Read-Titan, etc. are all names commonly used to describe Cafe fairings.
Paul Dunstall had his fiberglass products manufactured by Reg Curley.
Read Titan was a U.K. based motorcycle performance shop/stockist whose fairings were provided by Churchgate Mouldings.
Avon was a brand name used by Mitchenall Bros. Mouldings. Avon bodywork was used by the Rickman Bros. for their roadrace and motocross kits as well as through a variety of other stockists. Avon fairings were also available as factory options through Triumph and BSA dealers.
The Read Titan (Churchgate) and Rickman/Avon (Mitchenall) nosecone fairings are very similar, but have subtle differences. Being from different manufacturers, the windscreens and nosecones will not interchange.
Cheers, Bret @ Glass from the Past