Paul -
Three helpful websites worth examining:
http://www.miramarshipindex.org.nz/
http://www.convoyweb.org.uk/hague/index.html
http://www.schiffswrackliste.de/
Within the past two years, several individuals active on Axis History Forum have stated that they are working on comprehensive lists of WWII ships sunk or damaged by aircraft. Some searching over there might lead you to these individuals.
Larry