Both .tbz and .rar files represent compressed archives. You can repack one to another with any manager that support both of these formats. Alternative would be to use two programs, first to decompress the .tbz archive and another to repack the files as .rar file. In any case, this should be pretty doable.
Convert bzip2 compressed TAR archive file to WinRAR RAR compressed archive.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert tbz to rar on Windows
One of the many available file compression utilities
Convert from tbz file format
|Yes, ALZip supports rar file conversion as a target file type.||Yes||No||No||No||No||No||Yes|
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.