About to buy a work vehicle buy which one due to Insurance ?

I need a to buy a work vehicle however is there a website that I can use to check which one I'd get charged more for. I want to be able to see which vehicles are more, I have full coverage on all of my other vehicles but this one would be the Ca minumum of just liability. I need a vehicle that I can install a ladder rack (aka: lumber rack) and carry a 24' ladder.

My options are:
used mini truck (preferably 4 cyl due to gas)
used El Camino early 70's no CA smog req.

(this way my tools would be outta the elements)
used mini van maybe Chevy Astro Cargo version
used station wagon

Since it is going to be just a work vehicle I want to pay as little as possible for the vehicle itself & for the insurance. For now I'm going to have to use my Suburban but I need to use a another ladder in order to place the extension ladder on top of my Suburban. Pain in the ass & I'd rather not chance messing it up.

el camino and station wagon are going to be the highest

Minivan will probably be the lowest, Minitruck will probably be slightly more

Are you sure ? I assumed that a Station wagon & Mini van would be around the same ?

you'd rank them via price for Ins. somethink like ?

1. El Camino
2. Station Wagon
3. Mini truck
4. Mini Van

Is there a website that I can use to confirm this since I'd rather not have to do a online quote & have Ins. sales guys hounding me for months over the phone & email.