Hi Anon,
sorry to hear about your damaged OP-1. You may think about sending TE pictures of it and that it still works. might be good promotion and maybe they can help you with some spare parts or screws.
Getting a stripped screw out is a difficult mission. You probably found this technique page and tried some methods (rubber band, super glue like you mentioned):
[guide|13213]
I guess its one of the screws right on the keyboard. Those are countersunk head screws and you can't get a grip on them. Also you won't be able to cut them with a rotary tool. So eventually you probably need to drill it out by using a drill bit slightly smaller than the screw and get at least the head off.
I hope you will be able to get the OP-1 back in shape. Crossing fingers for you.