Most of the blacksmith shops here specialize in handmade gates and fences - a quick google search for "kovarstvi" turned out eg.
www.hefaiston.cz or
kovani.vyrobce.cz.
BTW, this weekend there will be an
international blacksmith event here in CZ.
I wouldn't worry about too little prevalence, just don't think there would be very pictorial waymarks in this category - usually that would be an ordinary shop or a village house with a "Kovar" sign
