You could use somebody like Securus.
Send the parcel via R.M.S.D. then get the insurance with Securus.
I meant to do this recently, I sent a Sub. off to Parkers, for a trade, meaning to get the insurance...Some family "emergency"! prevented me from getting the insurance...by the time i "remembered"! to get the insurance..it was to late.
I was sweating profusely! until I got confirmation that the watch had been delivered safely!