You can find the remote for your STR-DE897 here.

I couldn't find anything for your DVD-CX895V, but I found the RM-D149A remote for the DVD-CX875V. If yours is different, you can look up your remote at that site, but I don't think you will find anything there.

I did find a DVP-CX985V, but the manual didn't give a model number for the remote, and I didn't find any replacement for it.