I don't know whether you might be interested in the use of a small letter a with an e as an accent codified within the Private Use Area, but in case you might be interested, the web page is as follows.
http://www.users.globalnet.co.uk/~ngo/ligatur5.htm I have encoded the a with an e as an accent as U+E7B4 so that both variants may coexist in a document encoded in a plain text format and displayed with an ordinary TrueType font. http://www.users.globalnet.co.uk/~ngo William Overington 25 October 2002