Comprehensive Insurance on hobby trucks?

I searched the forums awhile but can't find any recent talk on my particular problem or the correct place to pose my question so I'll start here. Admins please move if this isn't the correct forum. I've got 5 - 70's Freightliner COE's that I work on at home as a hobby and a 79' Transtar 4370. Two of them I used for collateral on a small loan at the bank plus I'm getting several dollars invested in parts and labor(imagine that). My question is can someone recommend an insurance company that will cover them for a tree falling on them or fire? I had them with State Farm but they just told me they won't insure a semi tractor without a trailer. I explained they don't leave the driveway and aren't even licensed so I'm not going to buy a trailer. They said good because I need a trailer for every truck anyway!!! I then said OK I'll take the 5th wheels off and they're just straight trucks problem solved right? No, that's a unapproved "non-factory" alteration and they can't cover that. They then had the nerve to ask why I thought I was qualified to make that alteration and were pretty sure it was illegal and unsafe for me to do. After I explained to the ####### what a "5th wheel" was I explained I had been working on trucks for 38yrs, am a certified aircraft mechanic, former pipeline welder, and have a associate degree in engineering and hung up. I then went through the roof and called Country Companies to start moving my house, 3 pickups, wife's car, etc..LOL. So now I'm calmer and thinking there are other people out there with trucks they have as a hobby, but no commercial policy to tie them in with and are in the same boat as me that might have advice. Thanks for any and all advice you may have.

 

It was the same agent when I was trying to keep the insurance I had. I tried the RV thing too but same story I'd be modifying it which the underwriter kept calling illegal. Niavete but thinking you know the rules by the underwriter was the problem. The agent was mad as hell but couldn't do anything. I was going to try haggerty but grundy is a new one. Thanks.

 

Hmmm.... I'll check into that. Thank you sir.