RogerRB,
If you have not had any success in finding what you need, here are my suggestions for possible contacts and sources:
!) RAF Museum Archive. If you do not have your friend's logbook from Pensacola, there may be some logs that would help you in the Museum's collection. From my experience there, the archive may be able to search their logbook holdings using the search term "Pensacola" to find suitable examples. An appointment for a visit may be necessary.
2) Fleet Air Arm Museum Archive. I have no experience of their archive - but RAF training at Grosse Ille and Pensacola, etc., came under the "Towers Scheme" and was funded via the U.S. Navy. The F.A.A. were major beneficiary of the Towers Scheme and may have useful holdings - Course lists, etc.
3) The Catalina Society - operators of the Duxford based G-APBYA. The editor of society's newsletter & website is a great source of Catalina information and may know something of the Pensacola training programme..
4) "British Naval Aviation in World War II." by Gilbert S. Guinn & G.H. Bennett. A very good book on the "Towers Scheme" overall.. There are several pages relating to flying boat training at Pensacola.
5) You will find there is an address of a British Pensacola Veterans at
British Veterans Organizations
I am not sure if this society still functions - many such veterans associations have now disbanded due to the age of the membership. Their resources may be in the hands of one of the descendants or may have been lodged with such as the RAF Museum.
Hope this helps, M-62A3