Find yourself an independent agent that deals with business insurance. I believe mine is Cincinnati Insurance group or something like that. They do well and have covered everything from hot work in a ditch to high wire work. Have never been questioned about what I do and they have not dropped me because they were scared I was welding on live gas lines, they just charge me more.
I dropped my business coverage and kept my truck on there as commercial and am adding my family vehicles as "business use"(as they are) but it is so much cheaper than the big name jokers.
Start calling around Monday morning to independents and grilling them on what is available. Some guys use some lady out of Oklahoma or Texas, not sure which and have heard it is dirt cheap($1200). I pay more for that on just my truck. Mine ran around $3600 per year, workers comp, truck, liability($1mil truck/$2mil business). Truck was around $750, workers comp, can't remember. I had to carry workers comp on myself here in Tennessee, really stupid as I cannot sue myself if I get hurt but some joker up there decided they needed more money I guess. I pay around $1400 per year on the truck alone now. This also includes tool coverage($250) and some carry over insurance in case something I have done goes boom in the future. Truck is actually $1250 but it is also a medium duty truck.
Hope this info helps you out. I know what it was like getting rolling, one man band and trying to find coverage.
Shawn