leg braces

please can you give me a cost for your strongest leg support hingable when I stand it feels like my leg is going to buckle backwards wen I am sitting down on a chair with my leg bent I can lean on it with no paini would like a strong brace that supports my knee in every way it also feels like it could bucle sideways alsoif you have the brace to support my knee to stop it going side to side and bacwards can you ship to koh samui thialand how long will it take I do not mind paying extra to get it here quiker also do you have a name and contact no my no is057812928 this is a thia chip so you will need the code for koh samuii await your earliest replythanks brett simpson