I had a quite different experience in Tbilisi. I looked everywere I could and went to bazar near the river at least 3 times. No khevsur swords! Only bad kindjals and russian army stuff.
I went to more Georgian cities and villages. I talked with a lot of people. No khevsur swords!
I also saw the weapons that dancing groups use. I hadled some of them.
They look like khevsur but they are not! They are simpler in construncion, different materials. Look photos. Sorry for the quality. It was difficult and I am not used of theater photos.
If you can find (live or video) Georgian dance with swords, see it. It is amazing. These guys really fight with fierce as they dance. As the blades strike there is light like fireworks!
The blades that are used in this dance are real steel but they are full of nicks.