Baja bound is great as is Alex Patterson and we have used both. We have an older Bronco (c/o, bypass, Deavers, bumps, 35's etc) that they could not offer anything other than limited full coverage on. Instant Mex the "SCORE" suggested provider offered "declared value full coverage" for the value we wanted but we have to be able to substantiate it with pics and receipts.
I always liked working with the aforementioned but they did not have an option online for anything older than 1999 and our Bronco is a '91. And after calling we were told we could not cover it for the real value through them period. Just info for consideration as it all depends on the coverage you want...
A little research told me that SCORE worked with Instant Mex to cover prerunners/chase trucks and retrieval vehicles.