The 1050's remote is going to have a much older database of codes than the 1070 and 990 use, so even if we can track down a code for the Oppo (and I'm not sure if there are codes for it or not) I doubt it'll work for the 1050. Also, keep in mind that the Oppo has shipped with two different remotes, each using different IR codes.
EDIT: You might contact Oppo's customer service and ask if they have any suggestions for remote database codes that might apply to the Oppo - for example, maybe they are using the same remote control codes as some other manufacturer. It's a bit of a long shot, but when I've communicated with Oppo's customer service they have been very responsive.