I am searching RM's Drama CDs English translation(I want to translate them into Chinese)，so i found here. Glad to find so many RM's resources and RM fans here.
Thanks for your works!
很高兴能找到这里。
Welcome!
The translations can be found here.
https://web.archive.org/web/20080618091741/http://www.rozen-unyu.net/
I only turned them into subtitles. There is still more to do but I don't have all the CDs.
Thanks!
To get other CDs，may be you can try this link: magnet:?xt=urn:btih:ECC6A563F8460D3DFE0EA5B0006657E88DCCCB5A
I found it at rutracker.org. It inlcudes most of the CDs published during 2005-2009, but still lacks of träumend Original Drama CD and träumend Original Drama CD Vol.2 Christmas special.
btw there is a Drama CD related to the New Rozen Maiden(2013),but I don't have it either.
Yup, I have this one from nyaa but as you said it still misses some. Soon I will have some time so maybe I will do the character dramas.