I have a few old music books which may be > 50 yrs old and are deteriorating but could be scanned.
I am not sure of copyright status.
I can mail them to anyone in USA if copyright is OK and anyone is interested in scanning.
e.g.
Scriabin preludes dated 1897
6 preludes op 13 - cover in Russian & French by M.P. Belaieff Leipzig.
5 preludes Op 16 - cover in French by M.P. Belaieff Leipzig
Grieg Norwegian Dance for 4 hands Op 35 - Peters Ed. No. 2056 - also printed in Leipzig