Wind instruments chamber music manuscripts: need help!

[Simon]

Hi! I'm looking for the manuscripts/archives of these composers, in relationship with some chamber music for wind instruments. If you have any idea, let me know! Thanks!!

- Louis Brassin (1840?-1884)
- Flodoard Geyer (1811-1872)
- Josef Haindl (1869-1931)
- Johann Christian Hauff (1811-1891)
- Johann Julius Schneider (1805-1885)
- Friedrich Gustav Schreiber (1817-1889)
- Moritz Siering (1821-1892)