I own a general gynecology clinic and did a lot of research before purchasing the Mona Lisa Touch. It uses a fractionated carbon dioxide laser, which is much more powerful than radio frequency devices and most other lasers, and thus gets better results. Despite this, it is not painful if you...
Unfortunately, none of the lasers do not work well on fibrosis after brachytherapy. I know this is a frustrating problem. I think your best best is using graduated dilators and lots of lube and patience. I skilled pelvic floor therapist can be very helpful.
I am aware of certain medical professionals and businesses who claim to have devices that constrict the vagina without requiring surgery. In my experience, vaginal tightening does not always yield results that are even somewhat comparable to those of a vaginoplasty.