Etienne Solere, according to the RED Classical Catalogue, lived from
1753-1817. He is probably French, though the guide does not say. In the
guide, there is only one piece: Sinfonie Concertante in F for 2 Clarinets
and Orchestra--Published 1790. It is on Hyperion 22017 (seems to be a
2-disc set). Hope this helps, and I would love to know more about him
if anyone has more of an idea than I do.
Daryl Loomis