insurance for the extreme modified?

[tastyratz]

so my s13 is going to be getting paint soon. Ive got an overly extreme level of modifications and prettymuch dont have anything stock left. Ive got a large sum of money and time into my car, and driving it I want to have it covered for a set value of a minimum of 20k. More than likely I will have to get it appraised which isnt a problem. Being that this is an 89 240 its not exactly blue book value.

Who here has a really extreme modified car or specialty unique case they get insured? Im not talking about a company that says they will cover your pink spraypainted steelies, or your cd player. Im talking people who have a very custom very time/money intensive car.

I tried asking progressive which is who I have now, but they said they wont cover it they just do book value.

Id rather not make this a discussion over whats been done to my car, how someone thinks x part is cool/sucks or go off topic.

Can someone point me in a good direction?