You have my deepest sympathies over the loss of your girl Nike.
I remember the struggles you had with Nike and I'm sorry she didn't make it... At least she is now free of pain and flying free on rainbow bridge with all our little friends that have left us.
Cherish all the precious moments you had with your girl, Nike will forever live on in your heart.
Rest in peace, Nike. You were much loved and will be missed.
The decision on getting Reebok a friend will depend on the daily amount of time you are able to spend with her and on her general behaviour and ability to adjust to being a solo bird.
You can spend some extra time with Reebok in order to strengthen the bond and depending on how she copes with the new reality, you will then have a better idea on what to do.
If she is generally happy and full energy, then she is adjusting well.
If on the contrary, you notice a decrease in her energy levels and she seems to be depressed despite your efforts in bonding with her, then getting her a new friend would be the best thing to do.