I did better.... I married the fine print

. My wife is the subro supervisor for the insurance company (not agent). I have to look up the policy, but, she assured me that an all risk endorsement is just that, all risk.
Prior to her current position she worked with the "VIP" policy department at another LARGE insurer (think hands). I know for a fact that you can insure your equipment (non commercial) with a no questions ask replacement policy under your home owners policy. I know because that was her department and I would here the stories.
A VERY famous member of a popular 60's 70's 80's 90's 00's and still going rock band once sang his message onto (into??) the voice mail system

. I should have save that one.
Anyway I'll try to pull the policy, truthfully I don't know who she put it with, what it costs, or anything other than what I've been told. If for any reason the gear needs replacing I'm covered minus the 250 deductible, at current replacement costs. I also know that the endorsement was accepted by Calumet for rentals up to $150K. The agent faxed the policy to them several years ago.
I also remember that when I was in college I wanted to rent 2 4800ws strobe setups. I remember my dad having the insurance agent write an endorsement to the rental company that covered the pack no matter what. At that time there was no way I could have covered the 'deposit' the rental company wanted. That was over 20 years ago.
Talk to your agent. The underwriting department can write anything providing that you are willing to pay the premium. Don't just assume that you have to accept the standard policy. Heck doesn't Lloyd's still insure the space shuttle?
Mark your are correct. I do most of my purchases on AMEX for that very reason. I don't know how they feel about business purchases though. I should ask.
Eric