Where can I get a Rhinoplasty retainer?

There are many available on Amazon. The simplest one is just a cage that goes in each nostril called “mute”. It is used to prevent snoring but probably is similar to the one you are referring to.

Hello! thank you for your question
As far as I can understand your question You can get it from any pharmacy in your area.
Best regards!

Hello you can order this from internet or you can order it from Turkey but they are not necessary so on

Good Morning! I often make my own nostril retainers for each patient probably similar to your surgeon in Turkey. Substitutes that may be close would be nasal cones. These are often available at Walgreens or Amazon. They help to decrease snoring and work similar to a Breathe-Rite strip but inside the nostril. I would try one of those options first. Good luck!