So I accidentally not knowing you can upgrade your Witcher Starting Gear dismantled it. Is there anyway of getting another chest? I know you can get better Witcher Gear, but I'm talking about the original Iconic gear.
You cannot recover the gear if you can't buy it back.
You cannot currently upgrade the Witcher starting gear.
This was an odd rumour based on the fact that you upgrade the crafted Witcher gear, later on.
Examples: feline school armour, ursine school sword, etc.
To answer the question, no, it's gone for good if you dismantled it.